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Recreational mathematics or puzzles with serious mathematical content. Note that math contest problems are generally considered off-topic.

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How to tackle this puzzle? [closed]

I stumbled on this puzzle on internet and I also have the answer. However I am not able to figure out whats the method to be used to arrive at the answer. … The puzzle is as below: The product of the ages of David's children is the square of the sum of their ages. David has less than eight children. None of his children have the same age. …
Akshar Prabhu Desai's user avatar