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What is the prime factor decomposition of 21?

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Anonymous

∙ 12y ago
Updated: 8/20/2019

1, 3 and 7

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∙ 12y ago
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The prime factor decomposition of 84 is: 2 x 2 x 3 x 7 If you want to see my working (in case I made a mistake): 84/2=42 (42 is not prime), 42/2=21 (21 is not prime), 21/3=7 (7 is prime, so stop here) factors: 2,2,3 and 7


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