Greatest Common Factor of 81, 72, 90

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

• Greatest Common Factor of 81, 72, 90 by common division method
• Greatest Common Factor of 81, 72, 90 with matching the biggest common factor

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∴ So the GCF of the given numbers is 3 x 3 = 9

Factors of 81

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

1,3,9,27,81

Factors of 72

List of positive integer factors of 72 that divides 72 without a remainder.

1,2,3,4,6,8,9,12,18,24,36,72

Factors of 90

List of positive integer factors of 90 that divides 90 without a remainder.

1,2,3,5,6,9,10,15,18,30,45,90

Greatest Common Factor

We found the factors 81,72,90 . The biggest common factor number is the GCF number.
So the greatest common factor 81,72,90 is 9.

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

• GCF of 45, 86, 40
• GCF of 44, 41, 40
• GCF of 55, 92, 92
• GCF of 28, 37, 83
• GCF of 84, 99, 95

1. What is the GCF of 81, 72, 90?

Answer: GCF of 81, 72, 90 is 9.

2. How to Find the GCF of 81, 72, 90

Answer: Greatest Common Factor(GCF) of 81, 72, 90 = 9

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

Step 2: Then multiply all the prime factors GCF(81, 72, 90) = 9.