Greatest Common Factor of 81, 23, 91, 3, 70

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

• Greatest Common Factor of 81, 23, 91, 3, 70 by common division method
• Greatest Common Factor of 81, 23, 91, 3, 70 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 81

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

1,3,9,27,81

Factors of 23

List of positive integer factors of 23 that divides 23 without a remainder.

1,23

Factors of 91

List of positive integer factors of 91 that divides 91 without a remainder.

1,7,13,91

Factors of 3

List of positive integer factors of 3 that divides 3 without a remainder.

1,3

Factors of 70

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

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

Greatest Common Factor

We found the factors 81,23,91,3,70 . The biggest common factor number is the GCF number.
So the greatest common factor 81,23,91,3,70 is 1.

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

• GCF of 73, 90, 15, 2, 12
• GCF of 91, 85, 28, 3, 32
• GCF of 61, 60, 48, 6, 58
• GCF of 87, 92, 70, 4, 47
• GCF of 39, 47, 93, 2, 68

1. What is the GCF of 81, 23, 91, 3, 70?

Answer: GCF of 81, 23, 91, 3, 70 is 1.

2. How to Find the GCF of 81, 23, 91, 3, 70

Answer: Greatest Common Factor(GCF) of 81, 23, 91, 3, 70 = 1

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

Step 2: Then multiply all the prime factors GCF(81, 23, 91, 3, 70) = 1.