Question

Explain how to use prime numbers to find a greatest common factor.

Answer 1

look below

Explanation:

Here's how to find the GCF of a set of numbers, using prime factorization:

List the prime factors of each number.

Circle every common prime factor — that is, every prime factor that's a factor of every number in the set.

Multiply all the circled numbers. The result is the GCF.