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Lowest Common Multiple
- The least common multiple (LCM) is the lowest number that is a multiple of 2 or more numbers.
- e.g find the LCM of 12 and 20:
- 12
- 2
- 6
- 3
- 3
- THESE ARE THE PRIME NUMBERS.
- THESE ARE THE PRIME NUMBERS.
- 3
- 2
- 20
- 2
- 10
- 2
- 5
- THESE ARE THE PRIME NUMBERS.
- THESE ARE THE PRIME NUMBERS.
- 2
- 2
- Write the numbers as a product of their prime factors.
- 12=2x2x3
- Start to cross them off in a venn diagram and you will end up with:
- The LCM of 12 and 20 is: 2x2x3x5=60
- The LCM of 12 and 20 is: 2x2x3x5=60
- Start to cross them off in a venn diagram and you will end up with:
- 20=2x2x5
- 12=2x2x3
- 12
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