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5 votes
(LCM) of 28, 42 and 63

User Jon Artus
by
7.3k points

2 Answers

6 votes

Answer:

LCM = 252.

Explanation:

First find their prime factors:

28 = 2*2*7

42 = 2*3*7

63 = 3*3*7

So, only including like factors once, LCM =

2*2*3*3*7

= 252

User Caleb Gates
by
7.5k points
7 votes

Answer:

252

Explanation:

The least common multiple is the product of all factors in the greatest number of their occurrence.

LCM = 2 x 2 x 3 x 3 x 7

LCM = 2^2 x 3^2 x 7

LCM = 252

The least common multiple of 28, 42 and 63 is 252.

User ShevaKuilin
by
8.1k points

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