What is the greatest common factor of 10 and 15______ The least common multiple is______ The greatest common factor of 18 and 12 is______ The least common multiple is______ ．

What is the greatest common factor of 10 and 15______ The least common multiple is______ The greatest common factor of 18 and 12 is______ The least common multiple is______ ．

① 10 = 2 × 5, 15 = 3 × 5, so the greatest common factor of 10 and 15 is 5, and the least common multiple is 2 × 3 × 5 = 30; ② 18 = 2 × 3 × 3, 12 = 2 × 2 × 3, so the greatest common factor of 18 and 12 is 2 × 3 = 6, and the least common multiple is 2 × 2 × 3 × 3 = 36

What is the greatest common factor of 15 and 10

It's five
The factor of 15 is 15, 5, 3, 1
The factor of 10 is 10, 5, 2, 1
So the greatest common factor of 15 and 10 is 5

The greatest common factor of 15 and 10
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The greatest common factor of 15 and 10 is 5