Solutions by everydaycalculation.com

The LCM of 21 and 8 is 168.

- Find the prime factorization of 21

21 = 3 × 7 - Find the prime factorization of 8

8 = 2 × 2 × 2 - Multiply each factor the greater number of times it occurs in steps i) or ii) above to find the LCM:

LCM = 2 × 2 × 2 × 3 × 7 - LCM =
**168**

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Find least common multiple (LCM) of: 42 & 16 63 & 24 105 & 40 147 & 56 42 & 8 21 & 16 63 & 8 21 & 24 105 & 8 21 & 40 147 & 8 21 & 56

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