Greatest Common Factor of 70, 51, 42, 81

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

• Greatest Common Factor of 70, 51, 42, 81 by common division method
• Greatest Common Factor of 70, 51, 42, 81 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 70

List of positive integer factors of 70 that divides 70 without a remainder.

1,2,5,7,10,14,35,70

Factors of 51

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

1,3,17,51

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

Greatest Common Factor

We found the factors 70,51,42,81 . The biggest common factor number is the GCF number.
So the greatest common factor 70,51,42,81 is 1.

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

• GCF of 97, 16, 49, 58
• GCF of 92, 62, 87, 15
• GCF of 82, 10, 74, 14
• GCF of 36, 89, 64, 21
• GCF of 91, 60, 22, 93

1. What is the GCF of 70, 51, 42, 81?

Answer: GCF of 70, 51, 42, 81 is 1.

2. How to Find the GCF of 70, 51, 42, 81

Answer: Greatest Common Factor(GCF) of 70, 51, 42, 81 = 1

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

Step 2: Then multiply all the prime factors GCF(70, 51, 42, 81) = 1.