Greatest Common Factor of 18, 56, 15, 85

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

• Greatest Common Factor of 18, 56, 15, 85 by common division method
• Greatest Common Factor of 18, 56, 15, 85 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 18

List of positive integer factors of 18 that divides 18 without a remainder.

1,2,3,6,9,18

Factors of 56

List of positive integer factors of 56 that divides 56 without a remainder.

1,2,4,7,8,14,28,56

Factors of 15

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

1,3,5,15

Factors of 85

List of positive integer factors of 85 that divides 85 without a remainder.

1,5,17,85

Greatest Common Factor

We found the factors 18,56,15,85 . The biggest common factor number is the GCF number.
So the greatest common factor 18,56,15,85 is 1.

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

• GCF of 22, 43, 43, 59
• GCF of 77, 81, 44, 87
• GCF of 25, 44, 94, 61
• GCF of 87, 80, 55, 62
• GCF of 94, 92, 46, 32

1. What is the GCF of 18, 56, 15, 85?

Answer: GCF of 18, 56, 15, 85 is 1.

2. How to Find the GCF of 18, 56, 15, 85

Answer: Greatest Common Factor(GCF) of 18, 56, 15, 85 = 1

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

Step 2: Then multiply all the prime factors GCF(18, 56, 15, 85) = 1.