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13 October, 10:36

What is the gcf of 42 and 70.?

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  1. 13 October, 10:44
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    The largest number that divides evenly into both 42 and 70 is 7.
  2. 13 October, 10:47
    0
    To find the GCF, you need to list prime numbers that can multiply into 42 and 70.

    42 - 7 * 2 * 3

    70 - 7 * 2 * 5

    So, the GCF, or Greatest Common Factor, of 42 and 70 is (7 * 2), since you can use the prime numbers 7 and 2 in both of their factor lists.
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