Greatest Common Factor of 15, 45, 12

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

• Greatest Common Factor of 15, 45, 12 by common division method
• Greatest Common Factor of 15, 45, 12 with matching the biggest common factor

Maximum 4 Number can be enter but you can reset

∴ So the GCF of the given numbers is 3 = 3

Factors of 15

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

1,3,5,15

Factors of 45

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

1,3,5,9,15,45

Factors of 12

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

1,2,3,4,6,12

Greatest Common Factor

We found the factors 15,45,12 . The biggest common factor number is the GCF number.
So the greatest common factor 15,45,12 is 3.

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

• GCF of 36, 98, 60
• GCF of 89, 43, 64
• GCF of 85, 58, 32
• GCF of 59, 79, 15
• GCF of 99, 70, 64

1. What is the GCF of 15, 45, 12?

Answer: GCF of 15, 45, 12 is 3.

2. How to Find the GCF of 15, 45, 12

Answer: Greatest Common Factor(GCF) of 15, 45, 12 = 3

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

Step 2: Then multiply all the prime factors GCF(15, 45, 12) = 3.