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Palmer805 Palmer805
  • 14-10-2015
  • Mathematics
Answered

What number between one and 20 has exactly 5 factors

Verified Answer :

dds1110 dds1110
  • 14-10-2015

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

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AL2006
AL2006 AL2006
  • 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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