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13 December, 15:40

Which is not a prime number 19,29,39

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Answers (2)
  1. 13 December, 16:16
    0
    The composite # is 39
  2. 13 December, 16:24
    0
    Prime numbers are numbers that are only divisible by 1 and themselves. So, to tell if a number is prime, look at its factors.

    19:

    1 x 19

    29:

    1 x 29

    39:

    1 x 39

    3 x 13

    So, because 39 has more than one set of factors, it's NOT a prime number.
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