Greatest Common Factor of 81, 12, 49, 11, 91

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

• Greatest Common Factor of 81, 12, 49, 11, 91 by common division method
• Greatest Common Factor of 81, 12, 49, 11, 91 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 12

List of positive integer factors of 12 that divides 12 without a remainder.

1,2,3,4,6,12

Factors of 49

List of positive integer factors of 49 that divides 49 without a remainder.

1,7,49

Factors of 11

List of positive integer factors of 11 that divides 11 without a remainder.

1,11

Factors of 91

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

1,7,13,91

Greatest Common Factor

We found the factors 81,12,49,11,91 . The biggest common factor number is the GCF number.
So the greatest common factor 81,12,49,11,91 is 1.

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

• GCF of 23, 19, 52, 66, 59
• GCF of 22, 31, 29, 36, 32
• GCF of 79, 33, 82, 34, 97
• GCF of 77, 88, 93, 98, 94
• GCF of 71, 76, 89, 39, 56

1. What is the GCF of 81, 12, 49, 11, 91?

Answer: GCF of 81, 12, 49, 11, 91 is 1.

2. How to Find the GCF of 81, 12, 49, 11, 91

Answer: Greatest Common Factor(GCF) of 81, 12, 49, 11, 91 = 1

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

Step 2: Then multiply all the prime factors GCF(81, 12, 49, 11, 91) = 1.