GCF for 90 and 685

What is the Greatest Common Factor of 90 and 685?

Answer: GCF of 90 and 685 is 5

(Five)

Finding GCF for 90 and 685 using all factors (divisors) listing

The first method to find GCF for numbers 90 and 685 is to list all factors for both numbers and pick the highest common one:

All factors of 90: 1, 2, 3, 5, 6, 9, 10, 15, 18, 30, 45, 90

All factors of 685: 1, 5, 137, 685

So the Greatest Common Factor for 90 and 685 is 5

Finding GCF for 90 and 685 by Prime Factorization

The second method to find GCF for numbers 90 and 685 is to list all Prime Factors for both numbers and multiply the common ones:

All Prime Factors of 90: 2, 3, 3, 5

All Prime Factors of 685: 5, 137

As we can see there is only one Prime Factor common to both numbers. It is 5

So 5 is the Greatest Common Factor of 90 and 685

GCF Table

Number 1Number 2GCF
756855
766851
776851
786851
796851
806855
816851
826851
836851
846851
856855
866851
876851
886851
896851
906855
916851
926851
936851
946851
956855
966851
976851
986851
996851
1006855
1016851
1026851
1036851
1046851

About "Greatest Common Factor" Calculator

This calculator will help you find the greatest common factor (GCF) of two numbers. For example, it can help you find out what is the Greatest Common Factor of 90 and 685? (The answer is: 5). Select the first number (e.g. '90') and the second number (e.g. '685'). After that hit the 'Calculate' button.
Greatest Common Factor (GCF) also known as the Greatest Common Divisor (GCD) or Highest Common Factor (HCF) - it is the largest positive integer that divides each of the integers with zero remainder

FAQ

What is the Greatest Common Factor of 90 and 685?

GCF of 90 and 685 is 5