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Question

What is the LCM of 10,15,20 and 30?


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Solution

Find the LCM of 10,15,20 and 30.

LCM of two or more is the smallest non-zero common multiple of the numbers.

Multiples of 10 are 10,20,30,40,50,60,...

Multiples of 15 are 15,30,45,60,...

Multiples of 20 are 20,40,60,...

Multiples of 30 are 30,60,90,...

LCM of 10,15,20,30 is 60.

Hence, LCM of 10,15,20 and 30 is 60.


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