GCD of 90, 81, 79, 39 Calculator

Given Input numbers are 90, 81, 79, 39

To find the GCD of numbers using factoring list out all the divisors of each number

Divisors of 90

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

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

Divisors of 81

List of positive integer divisors of 81 that divides 81 without a remainder.

1, 3, 9, 27, 81

Divisors of 79

List of positive integer divisors of 79 that divides 79 without a remainder.

1, 79

Divisors of 39

List of positive integer divisors of 39 that divides 39 without a remainder.

1, 3, 13, 39

Greatest Common Divisior

We found the divisors of 90, 81, 79, 39 . The biggest common divisior number is the GCD number.
So the Greatest Common Divisior 90, 81, 79, 39 is 1.

Therefore, GCD of numbers 90, 81, 79, 39 is 1

Given Input Data is 90, 81, 79, 39

Make a list of Prime Factors of all the given numbers initially

Prime Factorization of 90 is 2 x 3 x 3 x 5

Prime Factorization of 81 is 3 x 3 x 3 x 3

Prime Factorization of 79 is 79

Prime Factorization of 39 is 3 x 13

The above numbers do not have any common prime factor. So GCD is 1

Step1:

Let's calculate the GCD of first two numbers

The formula of GCD is GCD(a, b) = ( a x b) / LCM(a, b)

LCM(90, 81) = 810

GCD(90, 81) = ( 90 x 81 ) / 810

GCD(90, 81) = 7290 / 810

GCD(90, 81) = 9

Step2:

Here we consider the GCD from the above i.e. 9 as first number and the next as 79

The formula of GCD is GCD(a, b) = ( a x b) / LCM(a, b)

LCM(9, 79) = 711

GCD(9, 79) = ( 9 x 79 ) / 711

GCD(9, 79) = 711 / 711

GCD(9, 79) = 1

Step3:

Here we consider the GCD from the above i.e. 1 as first number and the next as 39

The formula of GCD is GCD(a, b) = ( a x b) / LCM(a, b)

LCM(1, 39) = 39

GCD(1, 39) = ( 1 x 39 ) / 39

GCD(1, 39) = 39 / 39

GCD(1, 39) = 1

GCD of 90, 81, 79, 39 is 1

Here are some samples of GCD of Numbers calculations.

• GCD of 29, 41, 43, 21
• GCD of 81, 11, 38, 57
• GCD of 13, 88, 68, 73
• GCD of 93, 41, 88, 12
• GCD of 20, 29, 74, 20

1. What is the GCD of 90, 81, 79, 39?

GCD of 90, 81, 79, 39 is 1

2. Where do I get the detailed procedure to find GCD of 90, 81, 79, 39?

You can find a detailed procedure to find GCD of 90, 81, 79, 39 on our page.

3. How to find GCD of 90, 81, 79, 39 on a calculator?

You can find the GCD of 90, 81, 79, 39 by simply giving the inputs separated by commas and click on the calculate button to avail the Greatest Common Divisor in less time.