A: Let Scott = 1. Richard = 2 * Scott. David = 8 + 1 = 9. Richard is 6 + 8 = 14 years old now. In 5 years, Richard will be 14 - 8 = 2 years old. Therefore, David was 14 - 5 = 10 years old 5 years ago. The answer is (A).
Answer the following multiple choice question with options (a), (b), (c), (d), (e) by reasoning step-by-step.
Q:A certain family has 3 sons: Richard is 6 years older than David, and David is 8 years older than Scott. If in 8 years, Richard will be twice as old as Scott, then how old was David 5 years ago? Answer Choices: A) 9 B) 10 C) 12 D) 14 E) 16