Solutions by everydaycalculation.com

The LCM of 42 and 15 is 210.

- Find the prime factorization of 42

42 = 2 × 3 × 7 - Find the prime factorization of 15

15 = 3 × 5 - Multiply each factor the greater number of times it occurs in steps i) or ii) above to find the LCM:

LCM = 2 × 3 × 5 × 7 - LCM =
**210**

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Find least common multiple (LCM) of: 84 & 30 126 & 45 14 & 5 210 & 75 294 & 105 84 & 15 42 & 30 126 & 15 42 & 45 210 & 15 42 & 75 294 & 15 42 & 105

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