doremafasolatido doremafasolatido

30-10-2017
Mathematics

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21 and 61 which is composite and which is prime

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AnimeBrainly AnimeBrainly

30-10-2017

21 is a composite, because 21 x 1 = 21, and 7 x 3 = 21

61 is a prime, because it can only be multiplied by 1 to get 61

hope this helps

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alexisjohnsonn1 alexisjohnsonn1

30-10-2017

21 is composite because of 1*21 or 3*7 and 61 is prime because nothing besides itself can be multiplied to get 61

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