Comment by gnodar
8 hours ago
Ah, that makes sense. I originally read it differently.
> Mary is 24 years old. She is twice as old as Ann was when Mary was as old as Ann is now. How old is Ann?
Which I read as:
> Mary is 24 years old. When Mary was Ann's current age, Anne was half the age she currently is.
Which would mean Anne is 16 (because when Mary was 24-8=16, Anne's current age, then Anne was 16/2=8, half Anne's current age).
But re-reading it, then for that to be true the original would have needed to be phrased:
> Mary is 24 years old. She was twice as old as Ann was when Mary was as old as Ann is now. How old is Ann?
Indeed,
> (A writer to the Montgomery (Alabama) Advertiser of 1903-10-24 points out that you can get the apparently-most-common wrong answer if you read the puzzle incorrectly as “She was twice as old as Ann was when Mary [sic] was as old as Ann now is.”)