Least Common Multiple

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Least Common Multiple

The Least Common Multiple (LCM)is the smallest number that two or more numbers will divide into evenly.

To find the Least Common Multiple of two numbers:

  • Find the Greatest Common Factor (GCF) of the numbers
  • Multiply the numbers together
  • Divide the product of the numbers by the Greatest Common Factor.

Example: Find the LCM of 15 and 12

  • Determine the Greatest Common Factor of 15 and 12 which is 3
  • Either multiply the numbers and divide by the GCF (15*12=180, 180/3=60)
  • OR - Divide one of the numbers by the GCF and multiply the answer times the other number (15/3=5, 5*12=60)
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Find the Least Common Multiple

The Least Common Multiple of   is 

You have correct and incorrect.   This is percent correct

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