Greatest Common Factor of 78, 18, 89, 81

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

• Greatest Common Factor of 78, 18, 89, 81 by common division method
• Greatest Common Factor of 78, 18, 89, 81 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 78

List of positive integer factors of 78 that divides 78 without a remainder.

1,2,3,6,13,26,39,78

Factors of 18

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

1,2,3,6,9,18

Factors of 89

List of positive integer factors of 89 that divides 89 without a remainder.

1,89

Factors of 81

List of positive integer factors of 81 that divides 81 without a remainder.

1,3,9,27,81

Greatest Common Factor

We found the factors 78,18,89,81 . The biggest common factor number is the GCF number.
So the greatest common factor 78,18,89,81 is 1.

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

• GCF of 68, 26, 36, 51
• GCF of 20, 37, 28, 97
• GCF of 97, 49, 32, 13
• GCF of 40, 44, 56, 46
• GCF of 95, 34, 82, 13

1. What is the GCF of 78, 18, 89, 81?

Answer: GCF of 78, 18, 89, 81 is 1.

2. How to Find the GCF of 78, 18, 89, 81

Answer: Greatest Common Factor(GCF) of 78, 18, 89, 81 = 1

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

Step 2: Then multiply all the prime factors GCF(78, 18, 89, 81) = 1.