Age Trouble
Algebra
Level
3
Mary is 24 years old. Mary is twice as old as Ann was when Mary was as old as Ann now. How old is Ann now?
The answer is 18.
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Now: Mary -24 y/o , Ann-x y/o; Then:Mary -x y/o,Ann-12 y/o;
The age difference between the sisters is the same over time: 24-x=x-12, 2x=36, x=18, Ann is 18 y/o.