Greatest Common Factor of 21, 65, 80, 50

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

• Greatest Common Factor of 21, 65, 80, 50 by common division method
• Greatest Common Factor of 21, 65, 80, 50 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 65

List of positive integer factors of 65 that divides 65 without a remainder.

1,5,13,65

Factors of 80

List of positive integer factors of 80 that divides 80 without a remainder.

1,2,4,5,8,10,16,20,40,80

Factors of 50

List of positive integer factors of 50 that divides 50 without a remainder.

1,2,5,10,25,50

Greatest Common Factor

We found the factors 21,65,80,50 . The biggest common factor number is the GCF number.
So the greatest common factor 21,65,80,50 is 1.

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

• GCF of 60, 82, 51, 69
• GCF of 88, 55, 73, 22
• GCF of 88, 52, 55, 11
• GCF of 41, 75, 77, 57
• GCF of 74, 14, 39, 98

1. What is the GCF of 21, 65, 80, 50?

Answer: GCF of 21, 65, 80, 50 is 1.

2. How to Find the GCF of 21, 65, 80, 50

Answer: Greatest Common Factor(GCF) of 21, 65, 80, 50 = 1

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

Step 2: Then multiply all the prime factors GCF(21, 65, 80, 50) = 1.