Reducing fractions to their lowest terms by finding their highest common factor of the numerator and denominator
When adding or subtracting fractions with different denominators by finding their lowest common multiple
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Factoring by grouping is factoring by splitting an expression into two pairs of terms and factoring separately. This is generally used when you have four terms and nothing to factor out of all of them.
As a noun, a factor is a number or algebraic expression by which another is exactly divisible.
As a verb, factoring is a process of breaking down a number or algebraic expression into smaller component parts.
Least common factor is always 1. If you meant least common multiple, it would be 140. If you meant greatestcommon factor, it would be 4.
Umm, Lowest Common Multiple and Greatest Common Factor. Not Lowest Common Factor (Which would always be 1 no matter what the numbers are). If you meant LCM: 126 If you meant GCF: 6
7 is the greatest common factor of 4942 and 21, or of 49, 42 and 21, if that is what you meant.
8, whether you meant 3224 or 32 and 24.
The least common factor of any set of integers is 1.