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18 October, 06:14

What is the GFC of 40 and 60

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  1. 18 October, 06:44
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    GCF: 20

    Step-by-step explanation:

    The thing you want to do is factor both numbers down to their lowest primes.

    40:2 * 2 * 2 * 5

    60:2 * 2 * 5 * 3

    Now underline what is in both sets of primes. I'll bold them. The number that is bolded comes from 2 * 2 * 5 which is 20

    The highest common factor is 20
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