Greatest Common Factor of 18, 91, 78, 98

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

• Greatest Common Factor of 18, 91, 78, 98 by common division method
• Greatest Common Factor of 18, 91, 78, 98 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 91

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

1,7,13,91

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 98

List of positive integer factors of 98 that divides 98 without a remainder.

1,2,7,14,49,98

Greatest Common Factor

We found the factors 18,91,78,98 . The biggest common factor number is the GCF number.
So the greatest common factor 18,91,78,98 is 1.

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

• GCF of 95, 77, 86, 45
• GCF of 91, 12, 53, 30
• GCF of 56, 89, 22, 29
• GCF of 41, 65, 78, 19
• GCF of 21, 38, 64, 36

1. What is the GCF of 18, 91, 78, 98?

Answer: GCF of 18, 91, 78, 98 is 1.

2. How to Find the GCF of 18, 91, 78, 98

Answer: Greatest Common Factor(GCF) of 18, 91, 78, 98 = 1

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

Step 2: Then multiply all the prime factors GCF(18, 91, 78, 98) = 1.