Solutions by everydaycalculation.com

The LCM of 10 and 9 is 90.

- Find the prime factorization of 10

10 = 2 × 5 - Find the prime factorization of 9

9 = 3 × 3 - Multiply each factor the greater number of times it occurs in steps i) or ii) above to find the LCM:

LCM = 2 × 3 × 3 × 5 - LCM =
**90**

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Find least common multiple (LCM) of: 20 & 18 30 & 27 50 & 45 70 & 63 20 & 9 10 & 18 30 & 9 10 & 27 50 & 9 10 & 45 70 & 9 10 & 63

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