Question
Find Least Common Multiple of 16 and 20 by listing out the factors.
Answer
LCM( 16, 20 ) = 80
Explanation
Write down multiples of each number until you find the first common multiple:
The multipliers of 16 are: 16, 32, 48, 64, 80, 96, . . .
The multipliers of 20 are: 20, 40, 60, 80, 100, . . .
We can see that:
LCM( 16, 20 ) = 80
This solution can be visualized using a Venn diagram.
The LCM is equal to the product of all the numbers on the diagram.
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