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Mensa Prize Puzzle Competition - September 2020

Question: 

The ages of the Smith twins and the Jackson twins totals 54.

If the ages of the Jackson twins and one of the Smith twins totals 42, how old are the Smith twins?

Answer: 

Answer: 12. (Jackson twins are 15).

Closing Date: 
Wednesday, September 30, 2020
Show Answer On: 
Thursday, October 1, 2020