It is 10
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The least common factor of any two numbers is always one. The greatest common factor of these two is 4. The least common multiple is 120.
Short answer: There is none. There is not a least common factor of a single number, such as 120, because there cannot be any form of common factor without two or more numbers to compare. Common factors are factors that the numbers being compared have in common. The least common factor is the smallest factor that all the numbers being compared have in common. Thus, since there are not two or more numbers to compare, there is not a least common factor. Note: The least common factor of two or more positive integers is 1.
Subtract 25 from 50.
122
Both 10 and 20 are two-digit numbers that are factors of 20.