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What are the greatest common factors of 12 and 15?

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Sofia Jones Profile
Sofia Jones answered

3 because 3x4=12 and 3x5=15

David Shabazi Profile
David Shabazi answered

List out all the factors for each number, then find the largest factor that both numbers have in common.

12 = 1, 2, 3, 4, 6, 12

15 = 1, 3, 5, 15.

The greatest common factor in this case is 3.

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