Greatest Common Factor of 10, 45, 21

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

• Greatest Common Factor of 10, 45, 21 by common division method
• Greatest Common Factor of 10, 45, 21 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 10

List of positive integer factors of 10 that divides 10 without a remainder.

1,2,5,10

Factors of 45

List of positive integer factors of 45 that divides 45 without a remainder.

1,3,5,9,15,45

Factors of 21

List of positive integer factors of 21 that divides 21 without a remainder.

1,3,7,21

Greatest Common Factor

We found the factors 10,45,21 . The biggest common factor number is the GCF number.
So the greatest common factor 10,45,21 is 1.

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

• GCF of 82, 96, 69
• GCF of 35, 48, 15
• GCF of 93, 66, 50
• GCF of 69, 74, 60
• GCF of 72, 44, 73

1. What is the GCF of 10, 45, 21?

Answer: GCF of 10, 45, 21 is 1.

2. How to Find the GCF of 10, 45, 21

Answer: Greatest Common Factor(GCF) of 10, 45, 21 = 1

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

Step 2: Then multiply all the prime factors GCF(10, 45, 21) = 1.