Greatest Common Factor of 12, 90, 221

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

• Greatest Common Factor of 12, 90, 221 by common division method
• Greatest Common Factor of 12, 90, 221 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 12

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

1,2,3,4,6,12

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 221

List of positive integer factors of 221 that divides 221 without a remainder.

1,13,17,221

Greatest Common Factor

We found the factors 12,90,221 . The biggest common factor number is the GCF number.
So the greatest common factor 12,90,221 is 1.

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

• GCF of 25, 80, 418
• GCF of 64, 19, 632
• GCF of 35, 53, 179
• GCF of 76, 11, 748
• GCF of 91, 98, 544

1. What is the GCF of 12, 90, 221?

Answer: GCF of 12, 90, 221 is 1.

2. How to Find the GCF of 12, 90, 221

Answer: Greatest Common Factor(GCF) of 12, 90, 221 = 1

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

Step 2: Then multiply all the prime factors GCF(12, 90, 221) = 1.