Greatest Common Factor of 12, 28, 15, 78

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

• Greatest Common Factor of 12, 28, 15, 78 by common division method
• Greatest Common Factor of 12, 28, 15, 78 with matching the biggest common factor

Maximum 4 Number can be enter but you can reset

∴ 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 28

List of positive integer factors of 28 that divides 28 without a remainder.

1,2,4,7,14,28

Factors of 15

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

1,3,5,15

Factors of 78

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

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

Greatest Common Factor

We found the factors 12,28,15,78 . The biggest common factor number is the GCF number.
So the greatest common factor 12,28,15,78 is 1.

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

• GCF of 11, 10, 20, 99
• GCF of 66, 16, 72, 85
• GCF of 79, 80, 22, 95
• GCF of 76, 74, 95, 50
• GCF of 26, 25, 52, 84

1. What is the GCF of 12, 28, 15, 78?

Answer: GCF of 12, 28, 15, 78 is 1.

2. How to Find the GCF of 12, 28, 15, 78

Answer: Greatest Common Factor(GCF) of 12, 28, 15, 78 = 1

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

Step 2: Then multiply all the prime factors GCF(12, 28, 15, 78) = 1.