Greatest Common Factor of 42, 20, 85, 51, 77

Created By : Jatin Gogia

Reviewed By : Rajasekhar Valipishetty

Last Updated : Apr 06, 2023


GCF of two or more numbers Calculator allows you to quickly calculate the GCF of 42, 20, 85, 51, 77 i.e. 1 largest integer that divides all the numbers equally.

Greatest common factor (GCF) of 42, 20, 85, 51, 77 is 1.

GCF(42, 20, 85, 51, 77) = 1

GCF of 42, 20, 85, 51, 77

Greatest common factor or Greatest common divisor (GCD) can be calculated in two ways

GCF of:

Greatest Common Factor of 42,20,85,51,77

GCF of 42,20,85,51,77 is 1

∴ GCF of numbers is 1 because of no common factors present between them.

Greatest Common Factor (GCF) By Matching Biggest Common Factor Method

Factors of 42

List of positive integer factors of 42 that divides 42 without a remainder.

1,2,3,6,7,14,21,42

Factors of 20

List of positive integer factors of 20 that divides 20 without a remainder.

1,2,4,5,10,20

Factors of 85

List of positive integer factors of 85 that divides 85 without a remainder.

1,5,17,85

Factors of 51

List of positive integer factors of 51 that divides 51 without a remainder.

1,3,17,51

Factors of 77

List of positive integer factors of 77 that divides 77 without a remainder.

1,7,11,77

Greatest Common Factor

We found the factors 42,20,85,51,77 . The biggest common factor number is the GCF number.
So the greatest common factor 42,20,85,51,77 is 1.

GCF of two or more Numbers Calculation Examples

Frequently Asked Questions on GCF of 42, 20, 85, 51, 77

1. What is the GCF of 42, 20, 85, 51, 77?

Answer: GCF of 42, 20, 85, 51, 77 is 1.

2. How to Find the GCF of 42, 20, 85, 51, 77

Answer: Greatest Common Factor(GCF) of 42, 20, 85, 51, 77 = 1

Step 1: Divide all the numbers with common prime numbers having remainder zero.

Step 2: Then multiply all the prime factors GCF(42, 20, 85, 51, 77) = 1.