Question 278689
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There are only 5 possibilities given that the twins are the same age, the other child being the oldest, and the sum of their ages is 17:


*[tex \LARGE \ \ \ \ \ \ \ \ \ \ 1\,\times\,1\,\times\,15\ =\ 15] not a perfect square


*[tex \LARGE \ \ \ \ \ \ \ \ \ \ 2\,\times\,2\,\times\,13\ =\ 52] not a perfect square


*[tex \LARGE \ \ \ \ \ \ \ \ \ \ 3\,\times\,3\,\times\,11\ =\ 99] not a perfect square


*[tex \LARGE \ \ \ \ \ \ \ \ \ \ 4\,\times\,4\,\times\,9\ =\ 144\ =\ 12\,\times\,12] The answer


*[tex \LARGE \ \ \ \ \ \ \ \ \ \ 5\,\times\,5\,\times\,6\ = 150] not a perfect square


John
*[tex \LARGE e^{i\pi} + 1 = 0]
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