Question

Find the L.C.M of the following
a.3and7
b.4and5​

Answer 1

a. 21

b. 20

Explanation:

a. 3 and 7 are prime numbers, so their LCM is their product, 21

b.

4 = 2^2

5 = 5

LCM = 2^2 * 5 = 20

Answer:

a. 21

b. 20