GCD of 90, 61, 99, 91 Calculator

Given Input numbers are 90, 61, 99, 91

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 61

List of positive integer divisors of 61 that divides 61 without a remainder.

1, 61

Divisors of 99

List of positive integer divisors of 99 that divides 99 without a remainder.

1, 3, 9, 11, 33, 99

Divisors of 91

List of positive integer divisors of 91 that divides 91 without a remainder.

1, 7, 13, 91

Greatest Common Divisior

We found the divisors of 90, 61, 99, 91 . The biggest common divisior number is the GCD number.
So the Greatest Common Divisior 90, 61, 99, 91 is 1.

Therefore, GCD of numbers 90, 61, 99, 91 is 1

Given Input Data is 90, 61, 99, 91

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 61 is 61

Prime Factorization of 99 is 3 x 3 x 11

Prime Factorization of 91 is 7 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, 61) = 5490

GCD(90, 61) = ( 90 x 61 ) / 5490

GCD(90, 61) = 5490 / 5490

GCD(90, 61) = 1

Step2:

Here we consider the GCD from the above i.e. 1 as first number and the next as 99

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

LCM(1, 99) = 99

GCD(1, 99) = ( 1 x 99 ) / 99

GCD(1, 99) = 99 / 99

GCD(1, 99) = 1

Step3:

Here we consider the GCD from the above i.e. 1 as first number and the next as 91

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

LCM(1, 91) = 91

GCD(1, 91) = ( 1 x 91 ) / 91

GCD(1, 91) = 91 / 91

GCD(1, 91) = 1

GCD of 90, 61, 99, 91 is 1

Here are some samples of GCD of Numbers calculations.

• GCD of 61, 72, 38, 84
• GCD of 66, 88, 51, 16
• GCD of 35, 22, 58, 76
• GCD of 68, 82, 39, 59
• GCD of 47, 46, 22, 75

1. What is the GCD of 90, 61, 99, 91?

GCD of 90, 61, 99, 91 is 1

2. Where do I get the detailed procedure to find GCD of 90, 61, 99, 91?

You can find a detailed procedure to find GCD of 90, 61, 99, 91 on our page.

3. How to find GCD of 90, 61, 99, 91 on a calculator?

You can find the GCD of 90, 61, 99, 91 by simply giving the inputs separated by commas and click on the calculate button to avail the Greatest Common Divisor in less time.