Greatest Common Factor of 90, 78, 80, 81

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

• Greatest Common Factor of 90, 78, 80, 81 by common division method
• Greatest Common Factor of 90, 78, 80, 81 with matching the biggest common factor

Maximum 4 Number can be enter but you can reset

∴ GCF of numbers is 1 because of no common factors present between them.

Factors of 90

List of positive integer factors of 90 that divides 90 without a remainder.

1,2,3,5,6,9,10,15,18,30,45,90

Factors of 78

List of positive integer factors of 78 that divides 78 without a remainder.

1,2,3,6,13,26,39,78

Factors of 80

List of positive integer factors of 80 that divides 80 without a remainder.

1,2,4,5,8,10,16,20,40,80

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 90,78,80,81 . The biggest common factor number is the GCF number.
So the greatest common factor 90,78,80,81 is 1.

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

• GCF of 18, 39, 34, 92
• GCF of 42, 72, 27, 51
• GCF of 75, 44, 25, 77
• GCF of 68, 21, 99, 99
• GCF of 33, 12, 33, 12

1. What is the GCF of 90, 78, 80, 81?

Answer: GCF of 90, 78, 80, 81 is 1.

2. How to Find the GCF of 90, 78, 80, 81

Answer: Greatest Common Factor(GCF) of 90, 78, 80, 81 = 1

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

Step 2: Then multiply all the prime factors GCF(90, 78, 80, 81) = 1.