Answers

The lcm of 15 and 20 is 60.

Steps to find LCM

1. Find the prime factorization of 15
   15 = 3 × 5
2. Find the prime factorization of 20
   20 = 2 × 2 × 5
3. Multiply each factor the greater number of times it occurs in steps i) or ii) above to find the lcm:
   
   LCM = 2 × 2 × 3 × 5
4. LCM = 60

Find least common multiple (lcm) of: 30 & 40 45 & 60 75 & 100 3 & 4 105 & 140 30 & 20 15 & 40 45 & 20 15 & 60 75 & 20 15 & 100 105 & 20 15 & 140

LCM Calculator

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