What is the least common multiple for 20,8,9

The least common multiple is 360.

Step-by-step explanation:

The prime factorization of 8 is 2 * 2 * 2 = 2³

The prime factorization of 9 is 3 * 3 = 3²

The prime factorization of 20 is 2 * 2 * 5 = 2² * 5¹

For each prime factor (i. e., 2, 3, and 5), find where it occurs most often and write that value in a new list:

2³ * 3² * 5¹ = 2 * 2 * 2 * 3 * 3 * 5 = 360

The LCM is 2^3*5*9=360