Multiple choice general knowledge science & technology

• 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?

  1. 48

  2. 96

  3. 24

  4. 32
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Let total life = x years. Boy = x/4, youth = x/8, active man = x/2, old man = 12. Sum: x/4 + x/8 + x/2 + 12 = x. Common denominator 8: (2x + x + 4x)/8 + 12 = x → 7x/8 + 12 = x → 12 = x/8 → x = 96. Active man period = x/2 = 96/2 = 48 years. Verify: 24 + 12 + 48 + 12 = 96 ✓

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