Greatest Common Factor of 13, 90, 87, 12, 85

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

• Greatest Common Factor of 13, 90, 87, 12, 85 by common division method
• Greatest Common Factor of 13, 90, 87, 12, 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 13

List of positive integer factors of 13 that divides 13 without a remainder.

1,13

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 87

List of positive integer factors of 87 that divides 87 without a remainder.

1,3,29,87

Factors of 12

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

1,2,3,4,6,12

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 13,90,87,12,85 . The biggest common factor number is the GCF number.
So the greatest common factor 13,90,87,12,85 is 1.

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

• GCF of 55, 95, 21, 64, 25
• GCF of 51, 34, 31, 60, 95
• GCF of 54, 97, 99, 94, 85
• GCF of 82, 79, 21, 40, 26
• GCF of 59, 33, 77, 98, 11

1. What is the GCF of 13, 90, 87, 12, 85?

Answer: GCF of 13, 90, 87, 12, 85 is 1.

2. How to Find the GCF of 13, 90, 87, 12, 85

Answer: Greatest Common Factor(GCF) of 13, 90, 87, 12, 85 = 1

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

Step 2: Then multiply all the prime factors GCF(13, 90, 87, 12, 85) = 1.