Greatest Common Factor of 21, 11, 75, 105

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

• Greatest Common Factor of 21, 11, 75, 105 by common division method
• Greatest Common Factor of 21, 11, 75, 105 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 11

List of positive integer factors of 11 that divides 11 without a remainder.

1,11

Factors of 75

List of positive integer factors of 75 that divides 75 without a remainder.

1,3,5,15,25,75

Factors of 105

List of positive integer factors of 105 that divides 105 without a remainder.

1,3,5,7,15,21,35,105

Greatest Common Factor

We found the factors 21,11,75,105 . The biggest common factor number is the GCF number.
So the greatest common factor 21,11,75,105 is 1.

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

• GCF of 12, 75, 53, 705
• GCF of 39, 20, 39, 668
• GCF of 88, 83, 98, 936
• GCF of 21, 24, 70, 606
• GCF of 10, 46, 79, 352

1. What is the GCF of 21, 11, 75, 105?

Answer: GCF of 21, 11, 75, 105 is 1.

2. How to Find the GCF of 21, 11, 75, 105

Answer: Greatest Common Factor(GCF) of 21, 11, 75, 105 = 1

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

Step 2: Then multiply all the prime factors GCF(21, 11, 75, 105) = 1.