Greatest Common Factor of 42, 81, 9

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

• Greatest Common Factor of 42, 81, 9 by common division method
• Greatest Common Factor of 42, 81, 9 with matching the biggest common factor

Maximum 4 Number can be enter but you can reset

∴ So the GCF of the given numbers is 3 = 3

Factors of 42

List of positive integer factors of 42 that divides 42 without a remainder.

1,2,3,6,7,14,21,42

Factors of 81

List of positive integer factors of 81 that divides 81 without a remainder.

1,3,9,27,81

Factors of 9

List of positive integer factors of 9 that divides 9 without a remainder.

1,3,9

Greatest Common Factor

We found the factors 42,81,9 . The biggest common factor number is the GCF number.
So the greatest common factor 42,81,9 is 3.

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

• GCF of 23, 72, 5
• GCF of 80, 44, 2
• GCF of 86, 95, 2
• GCF of 60, 90, 5
• GCF of 39, 96, 4

1. What is the GCF of 42, 81, 9?

Answer: GCF of 42, 81, 9 is 3.

2. How to Find the GCF of 42, 81, 9

Answer: Greatest Common Factor(GCF) of 42, 81, 9 = 3

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

Step 2: Then multiply all the prime factors GCF(42, 81, 9) = 3.