Greatest Common Factor of 42, 21, 30, 67

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

• Greatest Common Factor of 42, 21, 30, 67 by common division method
• Greatest Common Factor of 42, 21, 30, 67 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 21

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

1,3,7,21

Factors of 30

List of positive integer factors of 30 that divides 30 without a remainder.

1,2,3,5,6,10,15,30

Factors of 67

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

1,67

Greatest Common Factor

We found the factors 42,21,30,67 . The biggest common factor number is the GCF number.
So the greatest common factor 42,21,30,67 is 1.

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

• GCF of 37, 42, 22, 62
• GCF of 81, 46, 54, 52
• GCF of 87, 42, 16, 60
• GCF of 51, 49, 60, 57
• GCF of 51, 67, 87, 65

1. What is the GCF of 42, 21, 30, 67?

Answer: GCF of 42, 21, 30, 67 is 1.

2. How to Find the GCF of 42, 21, 30, 67

Answer: Greatest Common Factor(GCF) of 42, 21, 30, 67 = 1

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

Step 2: Then multiply all the prime factors GCF(42, 21, 30, 67) = 1.