GCD of 43, 21, 25, 65 Calculator

Given Input numbers are 43, 21, 25, 65

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

Divisors of 43

List of positive integer divisors of 43 that divides 43 without a remainder.

1, 43

Divisors of 21

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

1, 3, 7, 21

Divisors of 25

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

1, 5, 25

Divisors of 65

List of positive integer divisors of 65 that divides 65 without a remainder.

1, 5, 13, 65

Greatest Common Divisior

We found the divisors of 43, 21, 25, 65 . The biggest common divisior number is the GCD number.
So the Greatest Common Divisior 43, 21, 25, 65 is 1.

Therefore, GCD of numbers 43, 21, 25, 65 is 1

Given Input Data is 43, 21, 25, 65

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

Prime Factorization of 43 is 43

Prime Factorization of 21 is 3 x 7

Prime Factorization of 25 is 5 x 5

Prime Factorization of 65 is 5 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(43, 21) = 903

GCD(43, 21) = ( 43 x 21 ) / 903

GCD(43, 21) = 903 / 903

GCD(43, 21) = 1

Step2:

Here we consider the GCD from the above i.e. 1 as first number and the next as 25

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

LCM(1, 25) = 25

GCD(1, 25) = ( 1 x 25 ) / 25

GCD(1, 25) = 25 / 25

GCD(1, 25) = 1

Step3:

Here we consider the GCD from the above i.e. 1 as first number and the next as 65

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

LCM(1, 65) = 65

GCD(1, 65) = ( 1 x 65 ) / 65

GCD(1, 65) = 65 / 65

GCD(1, 65) = 1

GCD of 43, 21, 25, 65 is 1

Here are some samples of GCD of Numbers calculations.

• GCD of 99, 59, 11, 41
• GCD of 82, 68, 96, 82
• GCD of 94, 47, 73, 61
• GCD of 50, 32, 30, 11
• GCD of 27, 54, 87, 21

1. What is the GCD of 43, 21, 25, 65?

GCD of 43, 21, 25, 65 is 1

2. Where do I get the detailed procedure to find GCD of 43, 21, 25, 65?

You can find a detailed procedure to find GCD of 43, 21, 25, 65 on our page.

3. How to find GCD of 43, 21, 25, 65 on a calculator?

You can find the GCD of 43, 21, 25, 65 by simply giving the inputs separated by commas and click on the calculate button to avail the Greatest Common Divisor in less time.