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To be a multiple of 4, 10 and 20 the number must be a multiple of their lowest common multiple.

lcm(4, 10, 20) = 20

What is required is a multiple of 20 between 61 and 107. The numbers 80 and 100 both satisfy the problem of being between 61 and 107 and being a multiple of 4, 10 and 20.

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โˆ™ 2017-04-17 17:51:37
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Q: What is the number between 61 and 107 that is a multiple of 4 10 and 20?
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