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Q: Which pair of these numbers has 20 as a common factor?

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The least common factor of any set of numbers is 1.

27 and 81 are a possibility. Also numbers like 5 and 10, 20 and 40.

The greatest common factor of the numbers 20 and 50 is 10.

20 and 30 are two numbers that have the greatest common factor of 10.

The greatest common factor of the numbers 8, 20, and 40 is 4.

The greatest common factor for both the numbers is 20.

The greatest common factor of the numbers 48 and 20 is 4.

The least common factor of any set of numbers is 1.

HCF of 2 means both numbers have a 2 as prime factor, but this is the only common prime factor. LCM of 20, means that between the two numbers we have factors of 2, 2 and 5. Assuming neither of the numbers are 2 or 20, this means we have to combine one number with the 2 and the other with the 5. This gives us 2x2 and 2x5 or 4 and 10.

A common factor is a factor both numbers can be evenly divided by.In this case it is 20.20/20 = 180/20 = 4

The least common factor of any set of numbers is 1.

The least common factor of any set of numbers is 1.

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