Greatest Common Factor of 90, 12, 99, 21, 38

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

• Greatest Common Factor of 90, 12, 99, 21, 38 by common division method
• Greatest Common Factor of 90, 12, 99, 21, 38 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 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 12

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

1,2,3,4,6,12

Factors of 99

List of positive integer factors of 99 that divides 99 without a remainder.

1,3,9,11,33,99

Factors of 21

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

1,3,7,21

Factors of 38

List of positive integer factors of 38 that divides 38 without a remainder.

1,2,19,38

Greatest Common Factor

We found the factors 90,12,99,21,38 . The biggest common factor number is the GCF number.
So the greatest common factor 90,12,99,21,38 is 1.

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

• GCF of 16, 41, 26, 52, 22
• GCF of 63, 78, 79, 94, 70
• GCF of 43, 66, 60, 28, 24
• GCF of 39, 13, 84, 79, 15
• GCF of 16, 23, 54, 73, 26

1. What is the GCF of 90, 12, 99, 21, 38?

Answer: GCF of 90, 12, 99, 21, 38 is 1.

2. How to Find the GCF of 90, 12, 99, 21, 38

Answer: Greatest Common Factor(GCF) of 90, 12, 99, 21, 38 = 1

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

Step 2: Then multiply all the prime factors GCF(90, 12, 99, 21, 38) = 1.