Solutions by everydaycalculation.com

The LCM of 21 and 70 is 210.

- Find the prime factorization of 21

21 = 3 × 7 - Find the prime factorization of 70

70 = 2 × 5 × 7 - 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: 42 & 140 63 & 210 105 & 350 147 & 490 3 & 10 42 & 70 21 & 140 63 & 70 21 & 210 105 & 70 21 & 350 147 & 70 21 & 490

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