GCD of 27, 21, 45, 25 Calculator

Given Input numbers are 27, 21, 45, 25

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

Divisors of 27

List of positive integer divisors of 27 that divides 27 without a remainder.

1, 3, 9, 27

Divisors of 21

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

1, 3, 7, 21

Divisors of 45

List of positive integer divisors of 45 that divides 45 without a remainder.

1, 3, 5, 9, 15, 45

Divisors of 25

List of positive integer divisors of 25 that divides 25 without a remainder.

1, 5, 25

Greatest Common Divisior

We found the divisors of 27, 21, 45, 25 . The biggest common divisior number is the GCD number.
So the Greatest Common Divisior 27, 21, 45, 25 is 1.

Therefore, GCD of numbers 27, 21, 45, 25 is 1

Given Input Data is 27, 21, 45, 25

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

Prime Factorization of 27 is 3 x 3 x 3

Prime Factorization of 21 is 3 x 7

Prime Factorization of 45 is 3 x 3 x 5

Prime Factorization of 25 is 5 x 5

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(27, 21) = 189

GCD(27, 21) = ( 27 x 21 ) / 189

GCD(27, 21) = 567 / 189

GCD(27, 21) = 3

Step2:

Here we consider the GCD from the above i.e. 3 as first number and the next as 45

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

LCM(3, 45) = 45

GCD(3, 45) = ( 3 x 45 ) / 45

GCD(3, 45) = 135 / 45

GCD(3, 45) = 3

Step3:

Here we consider the GCD from the above i.e. 3 as first number and the next as 25

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

LCM(3, 25) = 75

GCD(3, 25) = ( 3 x 25 ) / 75

GCD(3, 25) = 75 / 75

GCD(3, 25) = 1

GCD of 27, 21, 45, 25 is 1

Here are some samples of GCD of Numbers calculations.

• GCD of 46, 40, 85, 26
• GCD of 81, 50, 41, 97
• GCD of 24, 72, 29, 47
• GCD of 82, 63, 70, 53
• GCD of 60, 22, 63, 58

1. What is the GCD of 27, 21, 45, 25?

GCD of 27, 21, 45, 25 is 1

2. Where do I get the detailed procedure to find GCD of 27, 21, 45, 25?

You can find a detailed procedure to find GCD of 27, 21, 45, 25 on our page.

3. How to find GCD of 27, 21, 45, 25 on a calculator?

You can find the GCD of 27, 21, 45, 25 by simply giving the inputs separated by commas and click on the calculate button to avail the Greatest Common Divisor in less time.