Greatest Common Factor of 15, 15, 90, 72

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

• Greatest Common Factor of 15, 15, 90, 72 by common division method
• Greatest Common Factor of 15, 15, 90, 72 with matching the biggest common factor

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∴ 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 15

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

1,3,5,15

Factors of 90

List of positive integer factors of 90 that divides 90 without a remainder.

1,2,3,5,6,9,10,15,18,30,45,90

Factors of 72

List of positive integer factors of 72 that divides 72 without a remainder.

1,2,3,4,6,8,9,12,18,24,36,72

Greatest Common Factor

We found the factors 15,15,90,72 . The biggest common factor number is the GCF number.
So the greatest common factor 15,15,90,72 is 3.

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

• GCF of 90, 47, 12, 16
• GCF of 11, 74, 22, 29
• GCF of 42, 13, 78, 69
• GCF of 24, 21, 63, 55
• GCF of 63, 63, 99, 16

1. What is the GCF of 15, 15, 90, 72?

Answer: GCF of 15, 15, 90, 72 is 3.

2. How to Find the GCF of 15, 15, 90, 72

Answer: Greatest Common Factor(GCF) of 15, 15, 90, 72 = 3

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

Step 2: Then multiply all the prime factors GCF(15, 15, 90, 72) = 3.