Greatest Common Factor of 42, 79, 81, 5, 51

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

• Greatest Common Factor of 42, 79, 81, 5, 51 by common division method
• Greatest Common Factor of 42, 79, 81, 5, 51 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 79

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

1,79

Factors of 81

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

1,3,9,27,81

Factors of 5

List of positive integer factors of 5 that divides 5 without a remainder.

1,5

Factors of 51

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

1,3,17,51

Greatest Common Factor

We found the factors 42,79,81,5,51 . The biggest common factor number is the GCF number.
So the greatest common factor 42,79,81,5,51 is 1.

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

• GCF of 64, 47, 48, 4, 38
• GCF of 15, 82, 88, 9, 21
• GCF of 18, 99, 97, 3, 60
• GCF of 76, 76, 18, 5, 73
• GCF of 17, 91, 44, 6, 46

1. What is the GCF of 42, 79, 81, 5, 51?

Answer: GCF of 42, 79, 81, 5, 51 is 1.

2. How to Find the GCF of 42, 79, 81, 5, 51

Answer: Greatest Common Factor(GCF) of 42, 79, 81, 5, 51 = 1

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

Step 2: Then multiply all the prime factors GCF(42, 79, 81, 5, 51) = 1.