Greatest Common Factor of 42, 81, 64, 79

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

• Greatest Common Factor of 42, 81, 64, 79 by common division method
• Greatest Common Factor of 42, 81, 64, 79 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 42

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

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

Factors of 81

List of positive integer factors of 81 that divides 81 without a remainder.

1,3,9,27,81

Factors of 64

List of positive integer factors of 64 that divides 64 without a remainder.

1,2,4,8,16,32,64

Factors of 79

List of positive integer factors of 79 that divides 79 without a remainder.

1,79

Greatest Common Factor

We found the factors 42,81,64,79 . The biggest common factor number is the GCF number.
So the greatest common factor 42,81,64,79 is 1.

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

• GCF of 85, 44, 72, 35
• GCF of 80, 92, 81, 91
• GCF of 89, 18, 86, 93
• GCF of 51, 67, 13, 77
• GCF of 99, 37, 72, 39

1. What is the GCF of 42, 81, 64, 79?

Answer: GCF of 42, 81, 64, 79 is 1.

2. How to Find the GCF of 42, 81, 64, 79

Answer: Greatest Common Factor(GCF) of 42, 81, 64, 79 = 1

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

Step 2: Then multiply all the prime factors GCF(42, 81, 64, 79) = 1.