Jan is twice as old as her sister Betty, but half of Joe's age. Betty just got married. How old is Joe most li

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Answers:
Not enough information.
Here's one case: Betty is 20. Then Jan is 2(2) = 40.
Jan is half of Joe's age, so he must be 80.

In general, if x = Betty's age, then 2x = Jan's age, and 4x = Joe's age.

I figure Jan is 36, Betty is 18 and Joe is 72

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