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nlytoday at 1:25 PM3 repliesview on HN

Opus says Ann is 18


Replies

Cockbrandtoday at 1:44 PM

Sounds about right.

How I understand it:

Mary is 24, Ann is a few (n) years younger

  M = 24
  A = M-n
Mary is twice as old as Ann was when Mary was as old as Ann is now. So we have to deduct the age difference twice from Mary's current age to find out how old Ann was when Mary was as old as Ann is now, which is half Mary's current age:

  M-2n = M/2 = 12

  M-2n = 12 --> n=6
So the age difference is 6, and Ann is 18.
show 1 reply
zephentoday at 2:20 PM

But that was over a hundred years ago. She must be dead by now.

gh5000today at 1:31 PM

and the circle remains unbroken