Question

What is the least common multiple of 10 and 20?

Answer 1

20

Explanation:

First, find the factors of both 10 and 20

Factors of 10: 1, 2, 5, 10

Factors of 20: 1, 2, 4, 5, 10, 20

Notice any common factors?: 1, 2, 5, 10

Now multiply the greatest common factor, 10, with another even number to hopefully get 20: 10*2=20.

Hence, the least common multiple is 20.

Answer 2

20

Step-by-step explanation

We need to find the multiples of 10 and 20 (multiples of 10 = 10, 20, 30, 40; multiples of 20 = 20, 40, 60, 80) and choose the smallest multiple that is exactly divisible by 10 and 20, i.e., 20.