GCD of 55, 74, 18, 81 Calculator

Given Input numbers are 55, 74, 18, 81

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

Divisors of 55

List of positive integer divisors of 55 that divides 55 without a remainder.

1, 5, 11, 55

Divisors of 74

List of positive integer divisors of 74 that divides 74 without a remainder.

1, 2, 37, 74

Divisors of 18

List of positive integer divisors of 18 that divides 18 without a remainder.

1, 2, 3, 6, 9, 18

Divisors of 81

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

1, 3, 9, 27, 81

Greatest Common Divisior

We found the divisors of 55, 74, 18, 81 . The biggest common divisior number is the GCD number.
So the Greatest Common Divisior 55, 74, 18, 81 is 1.

Therefore, GCD of numbers 55, 74, 18, 81 is 1

Given Input Data is 55, 74, 18, 81

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

Prime Factorization of 55 is 5 x 11

Prime Factorization of 74 is 2 x 37

Prime Factorization of 18 is 2 x 3 x 3

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

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(55, 74) = 4070

GCD(55, 74) = ( 55 x 74 ) / 4070

GCD(55, 74) = 4070 / 4070

GCD(55, 74) = 1

Step2:

Here we consider the GCD from the above i.e. 1 as first number and the next as 18

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

LCM(1, 18) = 18

GCD(1, 18) = ( 1 x 18 ) / 18

GCD(1, 18) = 18 / 18

GCD(1, 18) = 1

Step3:

Here we consider the GCD from the above i.e. 1 as first number and the next as 81

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

LCM(1, 81) = 81

GCD(1, 81) = ( 1 x 81 ) / 81

GCD(1, 81) = 81 / 81

GCD(1, 81) = 1

GCD of 55, 74, 18, 81 is 1

Here are some samples of GCD of Numbers calculations.

• GCD of 87, 72, 58, 37
• GCD of 71, 25, 81, 58
• GCD of 25, 46, 90, 47
• GCD of 45, 66, 69, 16
• GCD of 91, 92, 73, 41

1. What is the GCD of 55, 74, 18, 81?

GCD of 55, 74, 18, 81 is 1

2. Where do I get the detailed procedure to find GCD of 55, 74, 18, 81?

You can find a detailed procedure to find GCD of 55, 74, 18, 81 on our page.

3. How to find GCD of 55, 74, 18, 81 on a calculator?

You can find the GCD of 55, 74, 18, 81 by simply giving the inputs separated by commas and click on the calculate button to avail the Greatest Common Divisor in less time.