Find Least Common Multiple of 63 and 21 by listing out the factors.
Answer
LCM( 63, 21 ) = 63
Explanation
Write down multiples of each number until you find the first common multiple:
The multipliers of 63 are: 63, 126, . . .
The multipliers of 21 are: 21, 42, 63, 84, . . .
We can see that:
LCM( 63, 21 ) = 63
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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