Greatest Common Factor of 42, 56, 67, 645

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

• Greatest Common Factor of 42, 56, 67, 645 by common division method
• Greatest Common Factor of 42, 56, 67, 645 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 42

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

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

Factors of 56

List of positive integer factors of 56 that divides 56 without a remainder.

1,2,4,7,8,14,28,56

Factors of 67

List of positive integer factors of 67 that divides 67 without a remainder.

1,67

Factors of 645

List of positive integer factors of 645 that divides 645 without a remainder.

1,3,5,15,43,129,215,645

Greatest Common Factor

We found the factors 42,56,67,645 . The biggest common factor number is the GCF number.
So the greatest common factor 42,56,67,645 is 1.

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

• GCF of 10, 96, 56, 705
• GCF of 65, 46, 60, 780
• GCF of 80, 44, 66, 117
• GCF of 32, 53, 46, 258
• GCF of 67, 93, 77, 788

1. What is the GCF of 42, 56, 67, 645?

Answer: GCF of 42, 56, 67, 645 is 1.

2. How to Find the GCF of 42, 56, 67, 645

Answer: Greatest Common Factor(GCF) of 42, 56, 67, 645 = 1

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

Step 2: Then multiply all the prime factors GCF(42, 56, 67, 645) = 1.