Greatest Common Factor of 77, 76, 21

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

• Greatest Common Factor of 77, 76, 21 by common division method
• Greatest Common Factor of 77, 76, 21 with matching the biggest common factor

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

Factors of 77

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

1,7,11,77

Factors of 76

List of positive integer factors of 76 that divides 76 without a remainder.

1,2,4,19,38,76

Factors of 21

List of positive integer factors of 21 that divides 21 without a remainder.

1,3,7,21

Greatest Common Factor

We found the factors 77,76,21 . The biggest common factor number is the GCF number.
So the greatest common factor 77,76,21 is 1.

Here are some samples of GCF of two or more Numbers calculations.

• GCF of 37, 67, 95
• GCF of 65, 68, 21
• GCF of 89, 28, 89
• GCF of 90, 65, 86
• GCF of 29, 75, 47

1. What is the GCF of 77, 76, 21?

Answer: GCF of 77, 76, 21 is 1.

2. How to Find the GCF of 77, 76, 21

Answer: Greatest Common Factor(GCF) of 77, 76, 21 = 1

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

Step 2: Then multiply all the prime factors GCF(77, 76, 21) = 1.