Greatest Common Factor of 21, 12, 99, 666

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

• Greatest Common Factor of 21, 12, 99, 666 by common division method
• Greatest Common Factor of 21, 12, 99, 666 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 12

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

1,2,3,4,6,12

Factors of 99

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

1,3,9,11,33,99

Factors of 666

List of positive integer factors of 666 that divides 666 without a remainder.

1,2,3,6,9,18,37,74,111,222,333,666

Greatest Common Factor

We found the factors 21,12,99,666 . The biggest common factor number is the GCF number.
So the greatest common factor 21,12,99,666 is 3.

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

• GCF of 86, 34, 14, 872
• GCF of 96, 18, 98, 329
• GCF of 91, 11, 38, 357
• GCF of 23, 18, 96, 163
• GCF of 60, 33, 43, 515

1. What is the GCF of 21, 12, 99, 666?

Answer: GCF of 21, 12, 99, 666 is 3.

2. How to Find the GCF of 21, 12, 99, 666

Answer: Greatest Common Factor(GCF) of 21, 12, 99, 666 = 3

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

Step 2: Then multiply all the prime factors GCF(21, 12, 99, 666) = 3.