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Question
Find out the LCM of the following number:
15, 20
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Solution
Multiples of 15 = 15, 30, 45, 60, 75, 90, 105, 120,...
Multiples of 20 = 20, 40, 60, 80, 100, 120,...
Common multiples of 15 and 20: 60, 120,...
∴ LCM of 15 and 20 = 60
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