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9 February, 02:51

Name a pair of factors that are both prime numbers and have a product of 21

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  1. 9 February, 03:01
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    First you need to make a list of prime numbers that can only be divisible by 1 and itself.

    here are examples of prime numbers: 1, 3, 5, 7, 9++

    once you have a list of the prime numbers just pick all of them that add up to 21.

    for example : a number divisible by only itself and one + another number divisible only by itself and one = 21
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