Greatest Common Factor of 68, 73, 21, 90

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

• Greatest Common Factor of 68, 73, 21, 90 by common division method
• Greatest Common Factor of 68, 73, 21, 90 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 68

List of positive integer factors of 68 that divides 68 without a remainder.

1,2,4,17,34,68

Factors of 73

List of positive integer factors of 73 that divides 73 without a remainder.

1,73

Factors of 21

List of positive integer factors of 21 that divides 21 without a remainder.

1,3,7,21

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

Greatest Common Factor

We found the factors 68,73,21,90 . The biggest common factor number is the GCF number.
So the greatest common factor 68,73,21,90 is 1.

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

• GCF of 35, 51, 62, 95
• GCF of 10, 43, 59, 33
• GCF of 91, 94, 74, 74
• GCF of 29, 46, 21, 13
• GCF of 84, 64, 32, 95

1. What is the GCF of 68, 73, 21, 90?

Answer: GCF of 68, 73, 21, 90 is 1.

2. How to Find the GCF of 68, 73, 21, 90

Answer: Greatest Common Factor(GCF) of 68, 73, 21, 90 = 1

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

Step 2: Then multiply all the prime factors GCF(68, 73, 21, 90) = 1.