Question

find the LCM of the following by prime factorization
a) 16,30,42
b) 28,15,42​

Answer 1

Answer:

Step-by-step explanation:

16 = 2 * 2 * 2 * 2

30 = 2 * 3 * 5

42 = 2 * 3 *  7

LCM = 2 * 3 * 5 * 7 * 2 * 2 * 2 = 1680

b) 28 = 2 *  2* 7

15 = 3 * 5

42 = 2 *  3 * 7

LCM = 2 * 2 * 3 * 5 * 7 = 420