What is the greatest common divisor of 9 and 15______ The least common multiple is______ ．

What is the greatest common divisor of 9 and 15______ The least common multiple is______ ．

9 = 3 × 3, 15 = 3 × 5, the greatest common divisor of 90 and 15 is 3, and the least common multiple is 3 × 3 × 5 = 45

The least common multiple of 9 and 6
Who can help me find it?

The answer is 18. The algorithm is as follows
The divisor of 9 and 6 is 3
9 divided by 3 left 3 6 divided by 3 left 2
2*3*3=18

The least common multiple of 9 and 15 and 16

9=3*3
15=3*5
16=2*2*2*2
So the least common multiple of 9, 15 and 16 = 3 * 3 * 5 * 2 * 2 * 2 * 2 = 720