Greatest Common Factor of 42, 12, 21, 25, 24

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

• Greatest Common Factor of 42, 12, 21, 25, 24 by common division method
• Greatest Common Factor of 42, 12, 21, 25, 24 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 42

List of positive integer factors of 42 that divides 42 without a remainder.

1,2,3,6,7,14,21,42

Factors of 12

List of positive integer factors of 12 that divides 12 without a remainder.

1,2,3,4,6,12

Factors of 21

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

1,3,7,21

Factors of 25

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

1,5,25

Factors of 24

List of positive integer factors of 24 that divides 24 without a remainder.

1,2,3,4,6,8,12,24

Greatest Common Factor

We found the factors 42,12,21,25,24 . The biggest common factor number is the GCF number.
So the greatest common factor 42,12,21,25,24 is 1.

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

• GCF of 77, 41, 29, 19, 50
• GCF of 69, 85, 96, 93, 31
• GCF of 82, 88, 47, 56, 52
• GCF of 88, 93, 94, 39, 43
• GCF of 72, 20, 12, 52, 57

1. What is the GCF of 42, 12, 21, 25, 24?

Answer: GCF of 42, 12, 21, 25, 24 is 1.

2. How to Find the GCF of 42, 12, 21, 25, 24

Answer: Greatest Common Factor(GCF) of 42, 12, 21, 25, 24 = 1

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

Step 2: Then multiply all the prime factors GCF(42, 12, 21, 25, 24) = 1.