Greatest Common Factor of 66, 12, 15, 5, 42

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

• Greatest Common Factor of 66, 12, 15, 5, 42 by common division method
• Greatest Common Factor of 66, 12, 15, 5, 42 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 66

List of positive integer factors of 66 that divides 66 without a remainder.

1,2,3,6,11,22,33,66

Factors of 12

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

1,2,3,4,6,12

Factors of 15

List of positive integer factors of 15 that divides 15 without a remainder.

1,3,5,15

Factors of 5

List of positive integer factors of 5 that divides 5 without a remainder.

1,5

Factors of 42

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

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

Greatest Common Factor

We found the factors 66,12,15,5,42 . The biggest common factor number is the GCF number.
So the greatest common factor 66,12,15,5,42 is 1.

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

• GCF of 29, 55, 68, 7, 87
• GCF of 32, 41, 77, 6, 28
• GCF of 85, 45, 37, 3, 64
• GCF of 89, 40, 32, 1, 83
• GCF of 57, 69, 52, 6, 36

1. What is the GCF of 66, 12, 15, 5, 42?

Answer: GCF of 66, 12, 15, 5, 42 is 1.

2. How to Find the GCF of 66, 12, 15, 5, 42

Answer: Greatest Common Factor(GCF) of 66, 12, 15, 5, 42 = 1

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

Step 2: Then multiply all the prime factors GCF(66, 12, 15, 5, 42) = 1.