Greatest Common Factor of 25, 64, 65, 20

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

• Greatest Common Factor of 25, 64, 65, 20 by common division method
• Greatest Common Factor of 25, 64, 65, 20 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 25

List of positive integer factors of 25 that divides 25 without a remainder.

1,5,25

Factors of 64

List of positive integer factors of 64 that divides 64 without a remainder.

1,2,4,8,16,32,64

Factors of 65

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

1,5,13,65

Factors of 20

List of positive integer factors of 20 that divides 20 without a remainder.

1,2,4,5,10,20

Greatest Common Factor

We found the factors 25,64,65,20 . The biggest common factor number is the GCF number.
So the greatest common factor 25,64,65,20 is 1.

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

• GCF of 42, 85, 18, 17
• GCF of 85, 47, 17, 68
• GCF of 31, 49, 86, 71
• GCF of 60, 17, 62, 48
• GCF of 50, 94, 32, 26

1. What is the GCF of 25, 64, 65, 20?

Answer: GCF of 25, 64, 65, 20 is 1.

2. How to Find the GCF of 25, 64, 65, 20

Answer: Greatest Common Factor(GCF) of 25, 64, 65, 20 = 1

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

Step 2: Then multiply all the prime factors GCF(25, 64, 65, 20) = 1.