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