What is the least common multiple of 40 and 18?

Answer 1

The LCM of 18 and 40 is: 360

The prime factorization of 18 = 2 x 3 x 3,

The prime factorization of 40 = 2 x 2 x 2 x 5.

The greatest common factor of 18 and 40 is 2, so their LCM = (18 x 40)/2 = 360

Answer 2

Find the GCF of (a) and (b), divide (a) by the GCF, then multiply by (b).

40 factors to [2 2 2 5]

18 factors to [2 3 3]

GCF=2

40 / 2 * 18 = 360◄