Brain Teaser help

[Over50Newbie]

Aaahh, now I see...

Thanks, uforgot!

Okay, here's one more. This one is much more math related:

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 9 years as an old man, then how many years did he spend as an active man?

Highlight to find answer.

Answer
36

Solution:

Fraction of life as a boy = 1/4
Fraction of life as a youth = 1/8
Fraction of life as an active man = 1/2
Fraction of life as boy, youth and active man = 1/4 + 1/8 + 1/2 = (2 + 1 + 4)/8 = 7/8
Fraction of life as an old man = 1 − 7/8 = 1/8
Thus, one-eighth of Man Wrinkle's life (as an old man) is 9 years.
So, Man Wrinkle's Age = 72 years.