Greatest Common Factor of 99, 25, 21, 221

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

• Greatest Common Factor of 99, 25, 21, 221 by common division method
• Greatest Common Factor of 99, 25, 21, 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 99

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

1,3,9,11,33,99

Factors of 25

List of positive integer factors of 25 that divides 25 without a remainder.

1,5,25

Factors of 21

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

1,3,7,21

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 99,25,21,221 . The biggest common factor number is the GCF number.
So the greatest common factor 99,25,21,221 is 1.

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

• GCF of 34, 17, 32, 134
• GCF of 15, 94, 10, 317
• GCF of 74, 12, 65, 326
• GCF of 92, 36, 72, 749
• GCF of 24, 38, 51, 600

1. What is the GCF of 99, 25, 21, 221?

Answer: GCF of 99, 25, 21, 221 is 1.

2. How to Find the GCF of 99, 25, 21, 221

Answer: Greatest Common Factor(GCF) of 99, 25, 21, 221 = 1

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

Step 2: Then multiply all the prime factors GCF(99, 25, 21, 221) = 1.