Man Wrinkle spent one-fourth of his life as a boy, one-eighth as a youth, and one-half as an active man. If Man Wrinkle spent 12 years as an old man, then how many years did he spend as an active man?
A
Correct answer
Explanation
Let total life = L. The fractions for boy + youth + active man = 1/4 + 1/8 + 1/2 = 7/8. So old age (12 years) = L - 7L/8 = L/8. This means L = 96 years total. Active man years = L/2 = 96/2 = 48 years. Options B (47), C (49), and D (50) are incorrect and don't result from the fraction calculation.