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The common factors of 20 and 45 are 1 and 5

Factors of 45: 1 and 45, 3 and 15, and 5 and 9

Factors of 20: 1 and 20, 2 and 10, and 4 and 5

So the common factors are 1 and 5.

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8y ago

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What is a multiple of 10 and a factor of 45?

If a multiple of 10 were a factor of 45, then both '10' and the multiple would be factors of 45. Since 10 is not a factor of 45, there is no such number.There are no multiples of 10 that are factors of 45.


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1,5 and your welcome