The least common multiple of 12 and 30 is () A. 12B. 30C. 60

The least common multiple of 12 and 30 is () A. 12B. 30C. 60

Because 12 = 2 × 2 × 3, 30 = 2 × 3 × 5, the least common factor of 12 and 30 is 2 × 3 × 2 × 5 = 60

What is the least common multiple of 20, 18 and 10

The least common multiple of 20, 18 and 10 is 180
20=2×2×5
18=2×9
10=2×5
The least common multiple of 20, 18 and 10 is 2 × 2 × 5 × 9 = 180

15. What is the least common multiple of 18 and 10?

It's not 180. It's 90
First it's 15, 18, 10, which is divided by 2, equal to 15 constant, 9 and 5, then divided by 5, equal to 3,9 constant, 1, then divided by 3, equal to 1,3,1, and finally multiplied by 2 × 5 × 3 × 1 × 3 × 1, equal to 90
That's it.