How to LCM

What is LCM?

LCM is the least common multiple is the smallest positive integer that is divisible by both given numbers.

To find the LCM of 3 numbers:

Method I:  

Step 1: List the multiple of those 3 numbers , e.g. 2, 4, 6

Multiple of 2: 2, 4, 6, 8, 10, 12, ......

Multiple of 4: 4, 8, 12,16, 20, ......

Multiple of 6: 6, 12, 18, 24, ....

Step 2: Find the Least common multiple

Multiple of 2: 2, 4, 6, 8, 10, 12, ......

Multiple of 4: 4, 8, 12,16, 20, ......

Multiple of 6: 6, 12, 18, 24, ....

So the LCM of 2,4,6 is 12


Quiz 1: Find the LCM of 3, 6 and 9

  • 9
  • 18
  • 24