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10 October, 12:24

Of the following numbers which one is prime 14 13 21 33

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  1. 10 October, 15:46
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    A prime number is a number which is only divisible by itself and 1.

    No even numbers can be primes because they are all divisible by 2.

    Therefore, 14 is not a prime number.

    21 : 3 = 7

    33 : 3 = 11

    That leaves 13.

    13 is a prime number.
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