Greatest Common Factor of 15, 91, 30, 2

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

• Greatest Common Factor of 15, 91, 30, 2 by common division method
• Greatest Common Factor of 15, 91, 30, 2 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 15

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

1,3,5,15

Factors of 91

List of positive integer factors of 91 that divides 91 without a remainder.

1,7,13,91

Factors of 30

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

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

Factors of 2

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

1,2

Greatest Common Factor

We found the factors 15,91,30,2 . The biggest common factor number is the GCF number.
So the greatest common factor 15,91,30,2 is 1.

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

• GCF of 65, 21, 61, 1
• GCF of 15, 90, 98, 7
• GCF of 82, 28, 13, 3
• GCF of 43, 71, 20, 3
• GCF of 82, 43, 63, 2

1. What is the GCF of 15, 91, 30, 2?

Answer: GCF of 15, 91, 30, 2 is 1.

2. How to Find the GCF of 15, 91, 30, 2

Answer: Greatest Common Factor(GCF) of 15, 91, 30, 2 = 1

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

Step 2: Then multiply all the prime factors GCF(15, 91, 30, 2) = 1.