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# What is the least common factor of 12 an 30?

Updated: 8/29/2023

Wiki User

8y ago

Best Answer

Lots of numbers are NOT common factors. For example, 5, 7, 100...Get the greatest common factor of both numbers. All common factors are factors of this greatest common factor. Note that all of them must needs be less than or equal to the greatest common factor.

Any other number is NOT a common factor.

Wiki User

7y ago
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Wiki User

8y ago

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

This answer is:

Wiki User

11y ago

Everything except 12, 24, 36 and so on.

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Wiki User

8y ago

Anything that isn't 1, 2, 3, 6

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Wiki User

7y ago

5

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