Greatest Common Factor of 42, 33, 68, 21

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

• Greatest Common Factor of 42, 33, 68, 21 by common division method
• Greatest Common Factor of 42, 33, 68, 21 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 33

List of positive integer factors of 33 that divides 33 without a remainder.

1,3,11,33

Factors of 68

List of positive integer factors of 68 that divides 68 without a remainder.

1,2,4,17,34,68

Factors of 21

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

1,3,7,21

Greatest Common Factor

We found the factors 42,33,68,21 . The biggest common factor number is the GCF number.
So the greatest common factor 42,33,68,21 is 1.

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

• GCF of 41, 76, 88, 87
• GCF of 16, 15, 74, 54
• GCF of 28, 50, 71, 42
• GCF of 76, 59, 19, 48
• GCF of 54, 99, 46, 68

1. What is the GCF of 42, 33, 68, 21?

Answer: GCF of 42, 33, 68, 21 is 1.

2. How to Find the GCF of 42, 33, 68, 21

Answer: Greatest Common Factor(GCF) of 42, 33, 68, 21 = 1

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

Step 2: Then multiply all the prime factors GCF(42, 33, 68, 21) = 1.