Greatest Common Factor of 21, 12, 40, 88

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

• Greatest Common Factor of 21, 12, 40, 88 by common division method
• Greatest Common Factor of 21, 12, 40, 88 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 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 40

List of positive integer factors of 40 that divides 40 without a remainder.

1,2,4,5,8,10,20,40

Factors of 88

List of positive integer factors of 88 that divides 88 without a remainder.

1,2,4,8,11,22,44,88

Greatest Common Factor

We found the factors 21,12,40,88 . The biggest common factor number is the GCF number.
So the greatest common factor 21,12,40,88 is 1.

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

• GCF of 62, 92, 18, 60
• GCF of 76, 91, 47, 94
• GCF of 64, 23, 30, 56
• GCF of 48, 92, 92, 71
• GCF of 25, 67, 95, 91

1. What is the GCF of 21, 12, 40, 88?

Answer: GCF of 21, 12, 40, 88 is 1.

2. How to Find the GCF of 21, 12, 40, 88

Answer: Greatest Common Factor(GCF) of 21, 12, 40, 88 = 1

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

Step 2: Then multiply all the prime factors GCF(21, 12, 40, 88) = 1.