Greatest Common Factor of 12, 78, 69, 2, 30

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

• Greatest Common Factor of 12, 78, 69, 2, 30 by common division method
• Greatest Common Factor of 12, 78, 69, 2, 30 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 12

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

1,2,3,4,6,12

Factors of 78

List of positive integer factors of 78 that divides 78 without a remainder.

1,2,3,6,13,26,39,78

Factors of 69

List of positive integer factors of 69 that divides 69 without a remainder.

1,3,23,69

Factors of 2

List of positive integer factors of 2 that divides 2 without a remainder.

1,2

Factors of 30

List of positive integer factors of 30 that divides 30 without a remainder.

1,2,3,5,6,10,15,30

Greatest Common Factor

We found the factors 12,78,69,2,30 . The biggest common factor number is the GCF number.
So the greatest common factor 12,78,69,2,30 is 1.

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

• GCF of 38, 99, 72, 1, 88
• GCF of 30, 51, 24, 8, 39
• GCF of 71, 47, 76, 7, 86
• GCF of 92, 36, 29, 8, 28
• GCF of 95, 60, 84, 9, 13

1. What is the GCF of 12, 78, 69, 2, 30?

Answer: GCF of 12, 78, 69, 2, 30 is 1.

2. How to Find the GCF of 12, 78, 69, 2, 30

Answer: Greatest Common Factor(GCF) of 12, 78, 69, 2, 30 = 1

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

Step 2: Then multiply all the prime factors GCF(12, 78, 69, 2, 30) = 1.