The Greatest Common Factor that can be used to re-write the equation is 13(1 + 5)
Greatest Common Factor is also known as Highest Common Factor and is the highest or largest number that is common to the numbers in question.
The numbers in question here is 13 and 65. We are to find the biggest factor that is present in both numbers. 13 as a number is prime, meaning it only has 1 and itself as its factors. 65 on the other hand can be factorized by 13. This essentially makes 13 the greatest factor of both numbers. And as such, we can re-write the equation as;
13 + 65
13(1 + 5)
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