Greatest Common Factor of 21, 99, 60

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

• Greatest Common Factor of 21, 99, 60 by common division method
• Greatest Common Factor of 21, 99, 60 with matching the biggest common factor

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

Factors of 21

List of positive integer factors of 21 that divides 21 without a remainder.

1,3,7,21

Factors of 99

List of positive integer factors of 99 that divides 99 without a remainder.

1,3,9,11,33,99

Factors of 60

List of positive integer factors of 60 that divides 60 without a remainder.

1,2,3,4,5,6,10,12,15,20,30,60

Greatest Common Factor

We found the factors 21,99,60 . The biggest common factor number is the GCF number.
So the greatest common factor 21,99,60 is 3.

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

• GCF of 91, 61, 98
• GCF of 32, 38, 70
• GCF of 91, 33, 19
• GCF of 24, 43, 71
• GCF of 79, 31, 93

1. What is the GCF of 21, 99, 60?

Answer: GCF of 21, 99, 60 is 3.

2. How to Find the GCF of 21, 99, 60

Answer: Greatest Common Factor(GCF) of 21, 99, 60 = 3

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

Step 2: Then multiply all the prime factors GCF(21, 99, 60) = 3.