Palmer805 Palmer805

14-10-2015
Mathematics

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What number between one and 20 has exactly 5 factors

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dds1110 dds1110

14-10-2015

1,2,4,8,16, these are the factors
your answer is 16

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14-10-2015

Interesting factoid: Only perfect squares have an odd number of factors. So we know to try 4, 9, and 16, and ignore the rest. It's 16, whose factors are 1, 2, 4, 8, and. 16 .

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