dataset_version
timestamp[s]
queId
stringlengths
32
32
difficulty
stringclasses
5 values
qtype
stringclasses
1 value
problem
stringlengths
6
2.89k
knowledge_point_routes
sequence
2023-07-07T00:00:00
b7e31907e86c496e848fa4239fbfcc8e
1
short_answer
Ali and Kumar share some country erasers at the ratio of $$7:5$$. After Ali gave Kumar $$10$$ country erasers, the ratio of the number of their country erasers become $1:5$. How many country erasers do they have altogether?
[ "Overseas Competition->Knowledge Point->Word Problem Modules->Solving Problems Involving Proportions->Ratio Word Problems with Invariant Sums" ]
2023-07-07T00:00:00
c5a32fbb6fcb46b48f3e67ce27fcc7b2
1
short_answer
Some students were solving math problems together. The $1$\textsuperscript{st} student solved $4$ problems, the $2$\textsuperscript{nd} student solved $7$ problems, the $3$\textsuperscript{rd} student solved $10$ problems, the $4$\textsuperscript{th} student solved $13$ problems and so on. Find the number of math problems solved by the $23$\textsuperscript{rd} student.
[ "Overseas Competition->Knowledge Point->Calculation Modules->Sequences and Number Tables->Arithmetic Sequences->Sum of Terms in Arithmetic Sequences" ]
2023-07-07T00:00:00
f015194282af429a8af72aaa964f578e
1
short_answer
Tina started her trip from city $$A$$. She went east for $$15\text{km}$$, then went north for $$3 \text{km}$$. After that she went west for $$9\text{km}$$. Finally, she went north for $$5 \text{km}$$ to end her trip at city $$B$$. What is the shortest distance, in $$\text{km}$$, from city $$A$$ to city $$B$$?
[ "Overseas Competition->Knowledge Point->Distance Word Problems->Distance Word Problems on Straight Road", "Overseas Competition->Knowledge Point->Word Problem Modules" ]
2023-07-07T00:00:00
7866c751419b4d9097fee74972b01d9d
1
short_answer
A shop sells bananas and pears. Max bought $1$ banana and $3$ pears. He paid $84$p. Emily bought $1$ banana and $1$ pear. She paid $48$p. How much does $1$ banana cost?
[ "Overseas Competition->Knowledge Point->Word Problem Modules->Equation Word Problems->Multivariate Linear Equation Word Problems->Solving Problems by Solving System of \nBinary Linear Equations with Integer Coefficients " ]
2023-07-07T00:00:00
30f09344ca4a4013b33fc28adc31ff05
1
short_answer
Eureka Primary School is having their Sports Day. Each activity is $$45$$-minute long, and there is a $$20$$-minute break between each activity. The entire duration of Sports Day, from the start of the first activity to the end of the last activity, is $$8$$ hours and $$20$$ minutes. How many activities are there in Sports Day?
[ "Overseas Competition->Knowledge Point->Combinatorics->Time Problem" ]
2023-07-07T00:00:00
69bc4bec9bee483683d61a26cbefa4ac
1
short_answer
Adam, Ben and Carl are weighing themselves. Together, Adam and Ben weigh $$102\text{kg}$$ Ben and Carl weigh $$97\text{kg}$$ Adam and Carl weigh $$92\text{kg}$$ What is their total weight in $$\text{kg}$$? Answer~\uline{~~~~~~~~~~}~
[ "Overseas Competition->Knowledge Point->Word Problem Modules->Applying of Multiplication and Division" ]
2023-07-07T00:00:00
b5e98b7ca17e48e9aceb47ddcd12fb5e
1
short_answer
There are four cards as shown below. $$\boxed{0}$$~ ~ $$\boxed{3}$$~ ~ $$\boxed{5}$$~ ~ $$\boxed{8}$$ Using each card only once, how many different $$4-$$digit numbers which are greater than $$5000$$ can be formed using the four cards?
[ "Overseas Competition->Knowledge Point->Counting Modules->Law of Addition and Multiplication->Principle of Multiplication", "Overseas Competition->Knowledge Point->Counting Modules->Permutations and Combinations->Combinations" ]
2023-07-07T00:00:00
999d1345ce434bc0b7648892d297c82e
2
short_answer
Find $$x$$. $$2+3\left( x-26 \right)=52-\left( x-40 \right)$$.
[ "Overseas Competition->Knowledge Point->Calculation Modules->Basic Concepts of Equation->Linear Equations with one Variable", "Overseas Competition->Knowledge Point->Calculation Modules->Basic Concepts of Equation->Equivalent Substitution->Algebraic Expressions" ]
2023-07-07T00:00:00
46cd8c8fc22a4192a04253ceaca842cf
1
short_answer
$$A$$\textquotesingle s efficiency is twice $$B$$\textquotesingle s and $A$ is able to finish a job in $$5$$ days less than $$B$$. In how many days can $$B$$ finish the work by himself?
[ "Overseas Competition->Knowledge Point->Word Problem Modules->Work Word Problems->Simple Work Word Problems" ]
2023-07-07T00:00:00
5993b277c13b4ff38cb800c6c4a33a65
0
short_answer
Sujatha's marks in $$4$$ tests were $$16$$, $$15$$, $$16$$ and $$10$$. What was her mean score? Answer:~\uline{~~~~~~~~~~}~
[ "Overseas Competition->Knowledge Point->Word Problem Modules->Average Problems ->Using Formulas->Finding the Average Directly" ]
2023-07-07T00:00:00
ec93c9b0e33b4132b916d18ebb789c94
1
short_answer
What is~$\dfrac{3}{5}$ of $35$?
[ "Overseas Competition->Knowledge Point->Calculation Modules->Fractions->Operations of Fractions->Multiplication of Fractions" ]
2023-07-07T00:00:00
899bd98193b34e558ea4353df664f200
1
short_answer
Mr Tan posted a question to the class. "Is $$123456$$ divisible by $$11$$?" After thinking for a few seconds, George answered "No, $123456$ is not divisible by $11$. There will be a remainder of $1$". Is George correct? If not, explain how George is able to get the answer without doing any calculations and find the correct answer.
[ "Overseas Competition->Knowledge Point->Word Problem Modules->Applying of Multiplication and Division" ]
2023-07-07T00:00:00
2fe30b6237e0498f8b46e088fbbc4301
1
short_answer
Claire buys $$40$$ bulbs. $$25 \%$$ are crocus bulbs,~$\dfrac{1}{5}$ are tulip bulbs and the rest are daffodil bulbs. How many daffodil bulbs does she buy?
[ "Overseas Competition->Knowledge Point->Word Problem Modules->Solving Problems Involving Fractions and Percentages->Percentages Word Problems" ]
2023-07-07T00:00:00
9f293803776049bca507bf11f748846b
0
short_answer
An icicle measured $2.06\text{m}$~at the start of a sunny day, but only $78\text{cm}$~at theend of the day. What length of icicle had melted?
[ "Overseas Competition->Knowledge Point->Calculation Modules->Unit Conversion->Converting between Units of Length" ]
2023-07-07T00:00:00
66c27502b84244db8f72fb311fd7f115
1
short_answer
What is $$40 \%$$ of $$650$$ grams?
[ "Overseas Competition->Knowledge Point->Word Problem Modules->Solving Problems Involving Fractions and Percentages->Knowing the Base" ]
2023-07-07T00:00:00
aa84ae289f2b4586bef8164084d18865
1
short_answer
Pip is climbing up a staircase with $$9$$ steps. If Pip is climbing either $$1$$ or $$4$$ steps up per move, how many different ways can he climb the staircase?
[ "Overseas Competition->Knowledge Point->Combinatorics->Strategies and Operations->Inductive Recursion" ]
2023-07-07T00:00:00
ee942986e3444be99926258561b6aba7
1
short_answer
Calculate the following answer using long division: $3549\div7=$~\uline{~~~~~~~~~~}~
[ "Overseas Competition->Knowledge Point->Number Theory Modules->Division without Remainders" ]
2023-07-07T00:00:00
b417154f43274315bf9c280cf406e937
1
short_answer
Pip can fold 17 paper planes in 12 minutes. How many paper planes did Pip fold in 36 minutes?
[ "Overseas Competition->Knowledge Point->Word Problem Modules->Unitary Method Problems" ]
2023-07-07T00:00:00
f50bfa91cfc94371b13058e0e79935a3
1
short_answer
A bus has $35$ passengers on board. At the first stop two-fifths get off and then $7$ people get on. At the next stop a quarter of the people remaining on the bus get off and then $13$ get on. How many passengers are there on the bus now?
[ "Overseas Competition->Knowledge Point->Word Problem Modules->Solving Problems Involving Fractions and Percentages->Finding the Base" ]
2023-07-07T00:00:00
96f6824d7c5c43528d8840695801e0fa
2
short_answer
Calculate: $$0.5^{3}+1^{3}+1.5^{3}+\cdots+10^{3}$$.
[ "Overseas Competition->Knowledge Point->Calculation Modules->Operations through Formulas->1³+2³+3³+......+n³=(1+2+3+......+n)²" ]
2023-07-07T00:00:00
2d139d10c0eb4247b231356fa4fdf082
1
short_answer
Mr Jones is shopping at a supermarket. He estimates that the price of the contents of his shopping trolley is £$35$ to the nearest £$5$. Assuming that he is correct, what is the least amount his shopping bill could actually be?
[ "Overseas Competition->Knowledge Point->Calculation Modules->Decimals->Basic Understanding of Decimals->Finding Approximate Values" ]
2023-07-07T00:00:00
40a2c5266dff4ef9b884738049f2b326
1
short_answer
The sum of Geoff\textquotesingle s age and his sister\textquotesingle s age is $$22$$. In how many years will the sum of their ages be $$40$$?
[ "Overseas Competition->Knowledge Point->Word Problem Modules->Age Problems->Basic Relationships in Age Problems" ]
2023-07-07T00:00:00
7f37d7d7b9fc4673a77900f514ce7751
1
short_answer
Three schools ordered a total of $$300$$ magazines. Each school ordered $$98$$ magazines at least and $$102$$ magazines at most. How many different combinations are there for the number of each school\textquotesingle s magazine orders?
[ "Overseas Competition->Knowledge Point->Counting Modules->Questions Involving Enumeration->Splitting Whole Numbers", "Overseas Competition->Knowledge Point->Counting Modules->Permutations and Combinations->Combinations", "Overseas Competition->Knowledge Point->Counting Modules->Law of Addition and Multiplication->Questions Involving Law of Addition and Multiplication" ]
2023-07-07T00:00:00
985600d1f0d24b41a9d3607140bd9878
1
short_answer
There are 40 toys in a row. The elephant is at the $$10^{\rm th}$$ position counting from left to right. There are $$5$$ toys counting from the rabbit to the elephant. If the elephant is on the right side of the rabbit, what is the rabbit\textquotesingle s position counting from right to left?
[ "Overseas Competition->Knowledge Point->Counting Modules->Law of Addition and Multiplication->Queuing Problems" ]
2023-07-07T00:00:00
ff86d855c39d4764a5ffb262848abdd0
1
short_answer
Nancy and Tim write a book together. Nancy can complete writing the book alone in $6$ days. If Tim helps, they can complete writing the book in $4$ days. How long will it take Tim to complete writing the book by himself?
[ "Overseas Competition->Knowledge Point->Word Problem Modules->Work Word Problems->Collaborative Work Word Problems" ]
2023-07-07T00:00:00
7a500b5489884af9ad95dc1143f1643a
1
short_answer
Alison has a large number of coloured pencils. When the pencils are divided between two of her friends there is one pencil left over. If they are divided between three friends there are two left over. Between four friends there would be three left over. Between five friends there would be four left over. What is the smallest number of coloured pencils that Alison could have?
[ "Overseas Competition->Knowledge Point->Number Theory Modules->Remainder Problems" ]
2023-07-07T00:00:00
bb41ee852bed4cf5adccccc9b1c77534
1
short_answer
Ewan shares $12$ biscuits equally between him and his $3$ sisters. How many biscuits do they get each? ~\uline{~~~~~~~~~~}~
[ "Overseas Competition->Knowledge Point->Word Problem Modules->Applying of Multiplication and Division" ]
2023-07-07T00:00:00
111b0f86493b40b19e61144527ced67f
1
short_answer
What is $$\dfrac{3}{7}$$ of $$385$$?
[ "Overseas Competition->Knowledge Point->Calculation Modules->Fractions->Operations of Fractions->Multiplication of Fractions" ]
2023-07-07T00:00:00
c694691621a9431ea4bca6bc4ce553d4
1
short_answer
Chef Ken used three special ingredients, $P$, $Q$ and $R$ to make a sauce. Each packet of Ingredient $P$ had a mass of $300\textasciitilde g$. Each packet of ingredients Q and R had a mass of $400\textasciitilde g$ and $500\textasciitilde g$ respectively. The ratio of the number of packets of ingredients $P$, $Q$ and $R$ used was $7 : 3 : 2$. Given that the total mass of the sauce was $172\textasciitilde kg$, how many packets of ingredients were used altogether?
[ "Overseas Competition->Knowledge Point->Calculation Modules->Ratios and Proportions" ]
2023-07-07T00:00:00
f3c6461dee114615a71a938306942695
0
short_answer
The \textbf{mean} of these numbers is $$12$$. What is the value of $$a$$? $$8$$~ ~ ~ $$14$$~ ~ ~ $$6$$~ ~ ~ $$9$$~ ~ ~ $$a$$~ ~ ~ $$13$$~ ~ ~ $$12$$
[ "Overseas Competition->Knowledge Point->Counting Modules->Statistics and Probability", "Overseas Competition->Knowledge Point->Word Problem Modules->Average Problems ->Using Formulas" ]
2023-07-07T00:00:00
e78f15baf14349d3a74406de623335fc
1
short_answer
The Road Authority decided to use a new system on traffic lights. The traffic lights are arranged such that $3$ traffic lights turn green at the same time every $9$ minutes. The first traffic light changes lights every minute and the second traffic light changes lights every $1.5$ minutes. Determine the shortest possible time the third traffic light takes to change lights, considering that it should be at least $30$ seconds or longer.
[ "Overseas Competition->Knowledge Point->Number Theory Modules->Factors and Multiples->Common Factors and Common Multiples" ]
2023-07-07T00:00:00
c9a78261a27b44b1bdd0c3d2ee5a8794
1
short_answer
There are three pieces of ribbon. The pink ribbon is $2.5$ metres long, the blue ribbon is $220$ centimetres long and the orange ribbon is $30.5$ centimetres long. Which ribbon is the longest? ~\uline{~~~~~~~~~~}~
[ "Overseas Competition->Knowledge Point->Calculation Modules->Unit Conversion->Converting between Units of Length" ]
2023-07-07T00:00:00
dab2cf7eb1d44c0eba4e7832b4ff92e8
1
short_answer
Sara is preparing a dish. It costs $10$ minutes for preparing ingredients, $15$ minutes for baking the dish, $5$ minutes for washing the plate, and $15$ minutes for eating. At least, it will take~\uline{~~~~~~~~~~}~minutes for Sara to finish the dish.
[ "Overseas Competition->Knowledge Point->Counting Modules" ]
2023-07-07T00:00:00
4c802ea687a8492b9acb91c335e6d58b
1
short_answer
You paid $75$ dollars for a cup on sale for $50 \%$ off. What was the original price of the cup?
[ "Overseas Competition->Knowledge Point->Calculation Modules->Percentage Calculation" ]
2023-07-07T00:00:00
758c762d7161444799a78a19de32398f
2
short_answer
There are 3 red cars, 12 blue cars and 15 green cars in the car park. Each red car can carry 10 people, each blue car can carry 15 people and each green car can carry 20 people. Find the average amount of people that each car can carry.
[ "Overseas Competition->Knowledge Point->Calculation Modules->Whole Numbers->Whole Numbers Multiplication and Division->Understanding Meanings of Multiplication" ]
2023-07-07T00:00:00
3ac7118d01c14ab5a18f0c5846d9e605
2
short_answer
Eleanor was travelling from City F to City G at a uniform speed. She drove past Rachel who was travelling at a uniform speed of $84 \text{km/h}$ in the opposite direction. One and a half hours later, Eleanor reached City G while Rachel was still $39 \text{km}$ away from City F. If Eleanor took $4$ hours to travel from City F to City G, what was the distance between the two cities?
[ "Overseas Competition->Knowledge Point->Calculation Modules->Basic Concepts of Equation->Equivalent Substitution->Algebraic Expressions" ]
2023-07-07T00:00:00
c4b23a034eb54649b787eefdf2846d0a
1
short_answer
The symbol "$⊙$" defines a new operation as shown below: $$1\odot 4=1+11+111+1111=1234$$ $$2\odot 3=2+22+222=246$$ $$3\odot 2=3+33=36$$ George tries to find the value of $$4\odot 3$$ using the following working: $$4\odot 3=3+33+333+3333$$ $$\textasciitilde\textasciitilde\textasciitilde\textasciitilde\textasciitilde\textasciitilde\textasciitilde\textasciitilde\textasciitilde=3702$$ Is he correct? If not, show the correct working and answer.
[ "Overseas Competition->Knowledge Point->Calculation Modules->Operations with New Definition->Finding Unknowns Using the Given Operations", "Overseas Competition->Knowledge Point->Calculation Modules->Operations with New Definition->Operating Directly" ]
2023-07-07T00:00:00
75592f9b267643f6ad1600fe6fa8b090
0
short_answer
A class consists of $25$ students. If only $5$ of them are boys, what percent is that?
[ "Overseas Competition->Knowledge Point->Word Problem Modules->Solving Problems Involving Fractions and Percentages->Percentages Word Problems" ]
2023-07-07T00:00:00
c6530b57d5304a398df4e406019afc9f
1
short_answer
Suppose that $1$ U.S. dollar is worth $1.25$ Canadian dollars. Sherry is traveling in Canada, and she wants to buy a book, which costs $64$ Canadian dollars. How many U.S. dollars does the book cost?
[ "Overseas Competition->Knowledge Point->Calculation Modules" ]
2023-07-07T00:00:00
1f5b327371834bc891e8992a355a3c02
1
short_answer
Sara is looking for a book in the library. The librarian tells her, "all the shelves in our library are arranged in one row. The book you are looking for is located on the $$8$$\textsuperscript{th} shelf if you count from front to back, and the $$10$$\textsuperscript{th} if you count from back to front. " How many shelves are there in the library?
[ "Overseas Competition->Knowledge Point->Word Problem Modules->Problems Involving Queuing->Finding the Total Number According to the Position of one Character in a Line" ]
2023-07-07T00:00:00
eb710dc184384ed3b2e9731301601159
1
short_answer
A test is with a full score of $100$ points. Five students in a group wants to reach an average of $90$ points. If everyone scores a different whole number, the lowest score among them could be~\uline{~~~~~~~~~~}~.
[ "Overseas Competition->Knowledge Point->Word Problem Modules->Average Problems " ]
2023-07-07T00:00:00
4b26a9102a274ba0b8e309640745063b
1
short_answer
Ribbon A is $3$ times as long as Rope B. Rope C is $56$ cm longer than Rope B. If Rope A is $1$ m $30$ cm longer than Rope C, find the total length of the three ropes.~\uline{~~~~~~~~~~}~cm.
[ "Overseas Competition->Knowledge Point->Calculation Modules->Unit Conversion->Converting between Units of Length" ]
2023-07-07T00:00:00
8af91674f16f411fb99260d559566771
1
short_answer
Subtract three times the smallest number from twice the largest number in this list: $$4$$, $$11$$, $$8$$, $$2$$, $$7$$, $$13$$ Answer~\uline{~~~~~~~~~~}~
[ "Overseas Competition->Knowledge Point->Calculation Modules->Whole Numbers->Mixed Operations" ]
2023-07-07T00:00:00
ce900c6f009e458cad1bdac095599872
0
short_answer
$4.6 - 3.55$
[ "Overseas Competition->Knowledge Point->Calculation Modules->Decimals->Addition and Subtraction of Decimals->Subtraction of Decimals" ]
2023-07-07T00:00:00
07ed7dd4a7c04b8aaf4b1c03f590920c
1
short_answer
A string of $3$ different letters is to be chosen from a group of letters: A, B, C, D ,E. What is the probability A and B will both be in the string?
[ "Overseas Competition->Knowledge Point->Calculation Modules" ]
2023-07-07T00:00:00
4287149f96d446cfa12f1fd21889e61b
2
short_answer
A youth club has $50$ male and $70$ female members. $16 \%$ of the male members and $10 \%$ of the female members are students. What percentage of the members are students?
[ "Overseas Competition->Knowledge Point->Word Problem Modules->Solving Problems Involving Fractions and Percentages->Finding the Rate" ]
2023-07-07T00:00:00
b2b5b4f81d8448afaba3be6d10769542
1
short_answer
200 litres ($$\text{L}$$) of a punch bowl that contains $$35 \%$$ fruit juice is mixed with $$300$$ litres of another punch bowl that contains $$50 \%$$ fruit juice. Find the percentage concentration of the new mixture.
[ "Overseas Competition->Knowledge Point->Word Problem Modules->Concentration Problems->Basic Concentration Problems" ]
2023-07-07T00:00:00
3c6c375d11374de1b3101dfbfc2c9524
1
short_answer
The ratio $$x:48$$ is equivalent to the ratio $$3:4$$. What is $$x$$?
[ "Overseas Competition->Knowledge Point->Calculation Modules->Ratios and Proportions->Ratio" ]
2023-07-07T00:00:00
5c67d22d929c48579cb3027189617400
1
short_answer
Work out $$1212\div6$$
[ "Overseas Competition->Knowledge Point->Calculation Modules->Whole Numbers->Whole Numbers Multiplication and Division->Division of Whole Numbers->Division out of the Multiplication Table" ]
2023-07-07T00:00:00
c18565e80cc44b0cb72b59076a383b6d
1
short_answer
Amy has $$37$$ apples and John has $$15$$ apples. How many apples does Amy have to give John such that she has exactly $$4$$ more apples than John?
[ "Overseas Competition->Knowledge Point->Word Problem Modules->Questions Involving Sum, Difference and Multiples->Problems Involving Sum and Difference" ]
2023-07-07T00:00:00
ae4e6b1dfa8a49a5b3241156334f3bed
1
short_answer
Betty, Veron, Eliza sold a total of $$855$$ cookies on National Girl Scout Cookie Day. Eliza sold twice as many cookies as Veron. Betty sold $$185$$ fewer cookies than Eliza. How many cookies did Betty sell?
[ "Overseas Competition->Knowledge Point->Calculation Modules" ]
2023-07-07T00:00:00
bc597e322c194058a175f92bfbfd92e3
2
short_answer
A teacher is marking the papers of the whole class. She plans to finish the work in $5$ hours. After working for one hour, she finds that if she wants to finish the work as planned, she needs to mark $6$ more papers per hour. But if she can mark $10$ more papers per hour, she can even finish marking all the papers $1$ hour earlier. How many papers does she need to mark in total?
[ "Overseas Competition->Knowledge Point->Word Problem Modules" ]
2023-07-07T00:00:00
ff63e777962f41f4899b17ad9e14deeb
2
short_answer
Work out: $1 + 3 + 5 + \ldots.. + 155 + 157 + 159$.
[ "Overseas Competition->Knowledge Point->Calculation Modules->Sequences and Number Tables->Arithmetic Sequences->Sum of Terms in Arithmetic Sequences" ]
2023-07-07T00:00:00
70deaa04761b4956a63e868e9ffc6d99
1
short_answer
Bud\textquotesingle s mother baked three types of pies. 40 of them were chicken pies, 20 were vegetable pies, and, 30 of them were fruit pies. (1) What fraction of the chicken pies more than vegetable pies? (2) What fraction of the vegetablw pies less than fruit pies?
[ "Overseas Competition->Knowledge Point->Word Problem Modules" ]
2023-07-07T00:00:00
622956fd3ac44f62a123456124a4a8b9
1
short_answer
Sally bought $$32$$ markers. She gave away $$7$$ markers. After that, she packed the markers left into bags of $$5$$. How many bags of markers did she pack? She packed~\uline{~~~~~~~~~~}~bags of markers.
[ "Overseas In-curriculum->Knowledge Point->Operations of Numbers ->Addition and Subtraction of Whole Numbers->Addition and Subtraction Within 100->Subtraction 1-digit Numbers from 2-digit Numbers", "Overseas In-curriculum->Knowledge Point->Operations of Numbers ->Division of Whole Numbers->Division Within the Multiplication Tables", "Overseas Competition->Knowledge Point->Calculation Modules->Comparing, Ordering and Estimating" ]
2023-07-07T00:00:00
dd320540af104d229ba61a14357af45a
1
short_answer
$$4$$ identical jugs and $$5$$ identical cups cost £$$85$$. $$2$$ identical jugs and $$2$$ identical cups cost £$$40$$. What is the cost of a cup?
[ "Overseas Competition->Knowledge Point->Word Problem Modules->Equation Word Problems->Equivalent Substitution in Equation Word Problems" ]
2023-07-07T00:00:00
939e258bc3ae4686add9892e1a88d211
1
short_answer
If $$ab$$ is a $$2$$-digit number such that $$8\times ab=3\times ba$$, find the value of the $2$-digit number $$ab$$.
[ "Overseas Competition->Knowledge Point->Number Theory Modules->Place Value and Number Bases" ]
2023-07-07T00:00:00
b75379f387c44ded9da89ecef088d85d
1
short_answer
Ken went to a restaurant. The bill for the meal was $55$ dollars, and he left a $20 \%$ tip (The tip is only based on the food bill here). There was also a sales tax which is $10 \%$ of the bill. What was the total cost of Ken\textquotesingle s meal?
[ "Overseas Competition->Knowledge Point->Calculation Modules" ]
2023-07-07T00:00:00
52eea861c20540a8873541169102d6b1
1
short_answer
Find the sum of the greatest $$1$$-digit even number and the smallest $$2$$-digit odd number.
[ "Overseas Competition->Knowledge Point->Number Theory Modules->Odd and Even Numbers" ]
2023-07-07T00:00:00
85d27affc1b445c88f9b4a5e100c1bd9
2
short_answer
A textbook has $$207$$ pages, numbering from $1$ to $207$. What is the sum of all the digits numbering this book?
[ "Overseas Competition->Knowledge Point->Word Problem Modules->Page Number Problem" ]
2023-07-07T00:00:00
433eb146729b4478bbfd89939dc13d1d
1
short_answer
Patrick has made~$\dfrac{3}{4}$ of the designs in his origami book. If he has made $$24$$ designs, how many are there altogether in his book?
[ "Overseas Competition->Knowledge Point->Word Problem Modules->Solving Problems Involving Fractions and Percentages->Finding the Base" ]
2023-07-07T00:00:00
9d40cceb3a7043b58f824a777d1db3e8
1
short_answer
How many three-digit numbers are there that have the sum of their digits equal to 4?
[ "Overseas Competition->Knowledge Point->Calculation Modules->Splitting Terms and Finding the General Term->Splitting Terms of Whole Numbers" ]
2023-07-07T00:00:00
9b15cde54f244f2688f75ecf97188c89
2
short_answer
The digit sum of $1024$ is $$1+0+2+4=7$$. How many three-digit numbers have a digit sum of $7$?
[ "Overseas Competition->Knowledge Point->Counting Modules" ]
2023-07-07T00:00:00
0e7224d495f743d994a3285524f8f2a5
2
short_answer
Caleb spent $$\frac{2}{5}$$ of his money on $$4$$ caps and $$6$$ wristbands. The cost of each cap is $$3$$ times the cost of each wristband. He bought some more caps with $$\frac{1}{3}$$ of his remaining money. How many caps did Caleb buy altogether?~\uline{~~~~~~~~~~}~caps
[ "Overseas Competition->Knowledge Point->Word Problem Modules" ]
2023-07-07T00:00:00
b9a7c7092370400a8a6b8c58ae2510c9
1
short_answer
$$5.4 + 3.7 =$$
[ "Overseas Competition->Knowledge Point->Calculation Modules->Decimals->Addition and Subtraction of Decimals->Addition of Decimals" ]
2023-07-07T00:00:00
8a063eb7bf3f4613bbd55a6c63048295
2
short_answer
A skydiver jumps from a hovering helicopter that\textquotesingle s 3,000 meters above the ground. If air resistance can be ignored, how fast will he be falling when his altitude is 2,000 m?
[ "Overseas Competition->Knowledge Point->Combinatorics->Magic Square" ]
2023-07-07T00:00:00
bacdd0107009480e90e10957f1ab6f1c
2
short_answer
A deck of $$52$$ cards have four different patterns: hearts, spades, diamonds and clubs. Each has $$13$$ numbers (From $$1$$ to $$13$$) At least how many cards do I need to draw to ensure that I can get $$4$$ cards with consecutive numbers?~\uline{~~~~~~~~~~}~
[ "Overseas Competition->Knowledge Point->Combinatorics->Pigeonhole Principle->Worst Case in Pigeonhole Principle Problems", "Overseas Competition->Knowledge Point->Counting Modules->Permutations and Combinations->Combinations" ]
2023-07-07T00:00:00
a43767a35548410b91388a97d31bf269
1
short_answer
A ten-digit number, $ABCDEFGHIJ$, is formed using the digit from $0$ to $9$, every digit being used exactly once. Its first digit can be divided by $1$, the number formed by the first two digits can be divided by $2$, and the number formed by the first three digits can be divided by $3\dots$, the whole number can be divided by $10$. If $$A=3$$, $$C=1$$, $$G=7$$, what digits does other letters represent?
[ "Overseas Competition->Knowledge Point->Number Theory Modules->Division without Remainders->Divisibility Rules" ]
2023-07-07T00:00:00
aa716df8b445405ab6cdebdb3ae4adf9
1
short_answer
Ashley is $$10$$ years old. Three years ago, she was $$2$$ years older than her brother. How old is Ashley\textquotesingle s brother?
[ "Overseas Competition->Knowledge Point->Word Problem Modules->Age Problems->Basic Relationships in Age Problems" ]
2023-07-07T00:00:00
9c2c49e5d3134ddeb8fb6b3c0c42f5cd
3
short_answer
A book has $89$ pages, but the page numbers are printed incorrectly. Every third page number has been omitted, so that the pages are numbered $1,2,4,5,7,8,\cdots $ and so on. What is the number on the last printed page?
[ "Overseas Competition->Knowledge Point->Word Problem Modules->Periodic Problems->Periodic Problems of Basic Permutation" ]
2023-07-07T00:00:00
6e9234dea3b64376a232e45d14effce4
1
short_answer
The tickets for a charity show were $$$5$$ for each adult and $$$3$$ for each child. $$19$$ tickets were sold. The total amount for the sale of tickets was$$$75$$. How many adult tickets were sold?~\uline{~~~~~~~~~~}~.
[ "Overseas Competition->Knowledge Point->Word Problem Modules->Questions Involving Sum, Difference and Multiples->Problems Involving Sum and Difference" ]
2023-07-07T00:00:00
5cb5ef0814c74ded81cb8b6ce6f1bbb5
1
short_answer
Solve the equation. $3x-(2x+3)=5$
[ "Overseas Competition->Knowledge Point->Calculation Modules->Basic Concepts of Equation->Linear Equations with one Variable" ]
2023-07-07T00:00:00
8a66caf6aaba494f95bca104943cb7c4
1
short_answer
$$459+3762$$
[ "Overseas Competition->Knowledge Point->Calculation Modules->Whole Numbers->Whole Numbers Addition and Subtraction ->Addition of Whole Numbers->Addition in Horizontal Form" ]
2023-07-07T00:00:00
0bced7bb4af84506acecdc385274abfd
1
short_answer
Among the natural numbers from $1$ to $600$, how many numbers are multiples of $3$ or $5$?
[ "Overseas Competition->Knowledge Point->Counting Modules->Permutations and Combinations->Combinations", "Overseas Competition->Knowledge Point->Counting Modules->Inclusion-Exclusion Principle->Inclusion-Exclusion Principle for Two Sets" ]
2023-07-07T00:00:00
f8495fe245f34edeb912b66b7ea8ce5c
1
short_answer
Calculate $123 + 468$
[ "Overseas Competition->Knowledge Point->Calculation Modules->Whole Numbers->Whole Numbers Addition and Subtraction ->Addition of Whole Numbers->Addition in Horizontal Form" ]
2023-07-07T00:00:00
66edf568e9a74a2aa97d9e92b05d94e2
1
short_answer
Tom is 10 years old now. Grandma says :" when you are 20 years old, I will be 60 years old." How old is Grandma now?
[ "Overseas Competition->Knowledge Point->Word Problem Modules->Age Problems" ]
2023-07-07T00:00:00
94bb6ae56dbd4a98a0fbeaa59c7d8691
3
short_answer
Miss Jenny is separating some candies for class A and class B. If each student in class A gets $4$ candies, $20$ more candies are needed. If each student in class B can get $6$ candies, there will be $16$ candies left. It is known that the number of students in class A is twice of class B. How many candies does Miss Jenny have?
[ "Overseas Competition->Knowledge Point->Word Problem Modules->Distribution Problems" ]
2023-07-07T00:00:00
9bfff3c25a624f939fbe758d02cada7b
2
short_answer
A file in the school bookshop costs $$70$$ pence. Jeremy has $$5$$ ten-pence, $$3$$ twenty-pence and $$1$$ fifty-pence coins in his wallet. In how many ways can he make up $$70$$ pence to pay for the file?
[ "Overseas Competition->Knowledge Point->Counting Modules->Questions Involving Enumeration->Enumeration", "Overseas Competition->Knowledge Point->Counting Modules->Permutations and Combinations->Combinations" ]
2023-07-07T00:00:00
ecaddfdc1ad84d24a6e9ae0e8904ebc2
1
short_answer
There are $$3$$ red stickers and $$3$$ green stickers in a bag. Without looking into the bag, at least how many stickers must you take from the bag to be sure you get $$2$$ stickers of the same colour?
[ "Overseas Competition->Knowledge Point->Counting Modules->Permutations and Combinations->Combinations", "Overseas Competition->Knowledge Point->Combinatorics->Pigeonhole Principle->Worst Case in Pigeonhole Principle Problems" ]
2023-07-07T00:00:00
24f3b610c11745edb5ef8e3bb5e6b77b
1
short_answer
There are $$5$$ blue balls, $$4$$ orange balls and $$2$$ yellow balls in a bag. Sheila will be blindfolded before she takes the balls out, one at a time. How many balls must Sheila take out in order to get $$4$$ balls of the same colour without questions?
[ "Overseas Competition->Knowledge Point->Counting Modules->Permutations and Combinations->Combinations", "Overseas Competition->Knowledge Point->Combinatorics->Pigeonhole Principle->Worst Case in Pigeonhole Principle Problems" ]
2023-07-07T00:00:00
9435fd70b9e341539b05792950bee0ca
1
short_answer
In the animal school,$$4$$ ducklings, $$2$$ baby geese and several lambs are taking lessons. The teacher owl finds out that all of her pupils have $$36$$ legs altogether. How many lambs are there among them?
[ "Overseas Competition->Knowledge Point->Word Problem Modules->Unitary Method Problems->Finding the Total Value using Unitary Method" ]
2023-07-07T00:00:00
dd8d8a23d4864feb861a8645d06813fa
1
short_answer
Five football teams play each other once. How many matches will need to be played?
[ "Overseas Competition->Knowledge Point->Counting Modules->Law of Addition and Multiplication->Law of Addition->Number of Handshake Problem" ]
2023-07-07T00:00:00
0dbb0cc68b7945019907f84cebf4487e
2
short_answer
There were three times as many boys as girls in a party. Each boy received $$2$$ sweets and each girl received $$4$$ sweets. There was a total of $$570$$ sweets. Find the number of boys who were present.~\uline{~~~~~~~~~~}~
[ "Overseas Competition->Knowledge Point->Word Problem Modules->Solving Problems Involving Proportions->Ratio Word Problems with Invariant Sums" ]
2023-07-07T00:00:00
7f4c057f9edc486381868b2cb62f8eb3
1
short_answer
The digits $3$, $1$, $9$ and $2$ can be arranged in any order to make four digit numbers. What is the difference between the largest and smallest numbers that you can make?
[ "Overseas Competition->Knowledge Point->Combinatorics->Combinatorics Involving Extreme Values->Extreme Value in Enumeration Problems" ]
2023-07-07T00:00:00
5395374ab911412c892a95bcb1538a6c
1
short_answer
SASMO 2015 P2 Q13 A fruit seller makes a solid pyramid out of identical fruit boxes. The top three layers are shown. What is the total number of fruit boxes in these top three layers?
[ "Overseas Competition->Knowledge Point->Counting Modules->Counting the Number of Figures->Counting Solid Figures->Counting Cubes" ]
2023-07-07T00:00:00
9882354a7f8745e7818f5641ce7c7354
1
short_answer
$8.7 \times 3.4$
[ "Overseas Competition->Knowledge Point->Calculation Modules->Decimals->Multiplication and Division of Decimals->Multiplication of Decimals" ]
2023-07-07T00:00:00
6c31ab9c5c724ce1b5dd8e18d56c817d
1
short_answer
Pavan bought a sandwich for £$2.35$, a drink for $78$ pence and a packet of crisps for $65$ pence. How much change will he have from a £$5$ note?
[ "Overseas Competition->Knowledge Point->Word Problem Modules->Applying Addition and Subtraction->Completing Equations According to Pictures (multiple variables)", "Overseas Competition->Knowledge Point->Calculation Modules->Decimals->Four Operations of Decimals" ]
2023-07-07T00:00:00
dfc1f111c9384999a8ce3a20bc2cffc5
1
short_answer
Neither of the two photocopiers in our office works very well. Photocopier $$\text{A}$$ produces $$1$$ \textquotesingle bad\textquotesingle{} copy for every $$4$$ \textquotesingle good\textquotesingle{} ones. Photocopier $$\text{B}$$ produces $$1$$ \textquotesingle bad\textquotesingle{} copy for every $$5$$ \textquotesingle good\textquotesingle{} ones. We need to produce $$600$$ \textquotesingle good\textquotesingle{} copies of a poster. $$\frac{3}{5}$$ of the \textquotesingle good\textquotesingle{} copies will be produced by Photocopier $$\text{A}$$. $$\frac{2}{5}$$ of the \textquotesingle good\textquotesingle{} copies will be produced by Photocopier $$\text{B}$$. How many copies in total (including the \textquotesingle bad\textquotesingle{} ones) will be needed?
[ "Overseas Competition->Knowledge Point->Word Problem Modules->Solving Problems Involving Fractions and Percentages->Knowing the Base" ]
2023-07-07T00:00:00
a53c706f0348463594c82aefd860177b
2
short_answer
Calculate: $$(1.2+1.23+1)\times (1.2+1.23+1)-(1.2+1.23+1)\times (1.2+1.23)=$$~\uline{~~~~~~~~~~}~
[ "Overseas Competition->Knowledge Point->Calculation Modules->Decimals->Multiplication and Division of Decimals->Multiplication of Decimals" ]
2023-07-07T00:00:00
ffae2b155c6e4e12a0dd3224c209353d
1
short_answer
A palindromic number is the same when written backwards as forwards, e.g.$$454$$ is a palindromic number. How many palindromic numbers are there between $$100$$ and $$200$$?
[ "Overseas Competition->Knowledge Point->Counting Modules->Law of Addition and Multiplication->Complex Forming Numbers->Complex Forming Numbers (with special requirements)" ]
2023-07-07T00:00:00
b7345c517ee645059ca6864ac5589ef4
2
short_answer
A farmer needs a total of $$24$$ hours to harvest his crops. If his son helps out by working for $$6$$ hours, they will finish the harvesting in $$16$$ hours. How many hours will the farmer\textquotesingle s son take to harvest the crops all by himself?
[ "Overseas Competition->Knowledge Point->Word Problem Modules->Work Word Problems->Collaborative Work Word Problems" ]
2023-07-07T00:00:00
53c10c1a3da34ac99c165981e9123c15
1
short_answer
In Norton Juster\textquotesingle s book \emph{The Phantom Tollbooth} we learn that the hero, Milo,smiles warmly on average $$47$$ times a day. How often would you expect him to smile warmly in January?(There are $$31$$ days in January)
[ "Overseas Competition->Knowledge Point->Word Problem Modules->Unitary Method Problems->Finding the Unit Rate and then the Total Value" ]
2023-07-07T00:00:00
765a3cf2104c412c90dfa3e660a67e11
1
short_answer
A group of $40$ students were supposed to form the shape of a square. How many students were there along one side of the square?
[ "Overseas Competition->Knowledge Point->Word Problem Modules->Interval Problems->Circular Paths->Planting Trees (circular path)" ]
2023-07-07T00:00:00
0fca214bb995431dbbfd8125bbcbb3a8
1
short_answer
Annie has $300$ grams of a solution with a sugar concentration of $15 \%$, Becky has $400$ grams of a solution with a sugar concentration of $25 \%$ and Carol has $300$ grams of a solution with a sugar concentration of $35 \%$. They mixed the solutions together. What is the concentration of the resulting sugar solution?
[ "Overseas Competition->Knowledge Point->Word Problem Modules->Concentration Problems->Basic Concentration Problems" ]
2023-07-07T00:00:00
8ce469dd3f78455bbe361dfbac65ec35
1
short_answer
A ball is dropped from a height of $10{\rm{m}}$. It bounces off the floor to half its original height. How far, in total, will the ball have travelled when it reaches the floor for a second time?
[ "Overseas Competition->Knowledge Point->Word Problem Modules->Applying Addition and Subtraction->Simple Addition and Subtraction" ]
2023-07-07T00:00:00
61c631f4351c4f37b2e5a67ac813bbb5
1
short_answer
Dorothy has $$96$$ stickers. She has 3 less than $$9$$ times as many stickers as Timmy. Kevin has $$45$$ more stickers than Timmy. How many stickers does Kevin have?
[ "Overseas Competition->Knowledge Point->Word Problem Modules->Questions Involving Sum, Difference and Multiples->Basic Computation of the Multiples", "Overseas Competition->Knowledge Point->Word Problem Modules->Applying Addition and Subtraction->Simple Word Problems Involving Comparing and Ordering" ]
2023-07-07T00:00:00
5d35989e2b284f488fb943b1ec405028
1
short_answer
Rehema rolls a fair dice $$30$$ times. How many times should she expect to get a $$5$$?
[ "Overseas Competition->Knowledge Point->Counting Modules->Statistics and Probability->Questions Involving Probability->Calculating the Probability by Enumerating" ]
2023-07-07T00:00:00
2b60051b00824874b4fa3beaf2110c81
1
short_answer
What is the largest three-digit number that is divisible by $36$?
[ "Overseas Competition->Knowledge Point->Number Theory Modules->Division without Remainders->Divisibility Rules" ]
2023-07-07T00:00:00
3a2ed089aaaf41639e7c8cf3a2c8a734
3
short_answer
I have five children and want to place them in a line for a photograph. However, Hugh refuses to stand anywhere in between Louise and Richard. How many ways are there to place the children in a line and still keep Hugh happy?
[ "Overseas Competition->Knowledge Point->Counting Modules" ]
2023-07-07T00:00:00
98777c411fcc4cb6af9079ff424408ba
0
short_answer
How many numbers are there from $1$ to $10$?
[ "Overseas Competition->Knowledge Point->Calculation Modules->Whole Numbers" ]