Posts tagged factors
Finding the greatest common factor of a pair or set of numbers
Finding the greatest common factor of a pair or set of numbers

A common factor of two positive whole numbers is a number that divides evenly into both of them. Their greatest common factor (sometimes abbreviated GCF) is the largest number that divides evenly into both of them. Another name that’s used for “greatest common factor” is “greatest common divisor” (sometimes abbreviated GCD).

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Finding the multiples of a number
Finding the multiples of a number

It’s helpful to think about multiples and divisibility as two parts of the same idea. We know that 10 is “divisible” by 5 because when we do the division 10/5, the result 2 is a whole number. It’s the fact that the result is a whole number that proves that 10 is divisible by 5.

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