Greatest Common Factor of 11, 45, 42, 81

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

• Greatest Common Factor of 11, 45, 42, 81 by common division method
• Greatest Common Factor of 11, 45, 42, 81 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 11

List of positive integer factors of 11 that divides 11 without a remainder.

1,11

Factors of 45

List of positive integer factors of 45 that divides 45 without a remainder.

1,3,5,9,15,45

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

Greatest Common Factor

We found the factors 11,45,42,81 . The biggest common factor number is the GCF number.
So the greatest common factor 11,45,42,81 is 1.

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

• GCF of 14, 65, 82, 63
• GCF of 27, 88, 24, 39
• GCF of 74, 12, 92, 37
• GCF of 40, 91, 11, 70
• GCF of 35, 49, 12, 33

1. What is the GCF of 11, 45, 42, 81?

Answer: GCF of 11, 45, 42, 81 is 1.

2. How to Find the GCF of 11, 45, 42, 81

Answer: Greatest Common Factor(GCF) of 11, 45, 42, 81 = 1

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

Step 2: Then multiply all the prime factors GCF(11, 45, 42, 81) = 1.