Solutions by everydaycalculation.com

The lcm of 7 and 20 is 140.

- Find the prime factorization of 7

7 = 7 - Find the prime factorization of 20

20 = 2 × 2 × 5 - Multiply each factor the greater number of times it occurs in steps i) or ii) above to find the lcm:

LCM = 2 × 2 × 5 × 7 - LCM =
**140**

Find least common multiple (lcm) of: 14 & 40 21 & 60 35 & 100 49 & 140 14 & 20 7 & 40 21 & 20 7 & 60 35 & 20 7 & 100 49 & 20 7 & 140

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