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17 June, 05:05

Which choice is a factor of 21? A. 4 b. 6 c. 3 or d. 11

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Answers (2)
  1. 17 June, 05:53
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    3! The reason is because if you divide 21 by 3 you get 7. Multiply 7 by 3 and then you get 21
  2. 17 June, 07:01
    0
    c. 3

    Step-by-step explanation:

    21 = 3*7

    3 and 7 are prime factors
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