GCD of 66, 15, 70, 25 Calculator

Given Input numbers are 66, 15, 70, 25

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

Divisors of 66

List of positive integer divisors of 66 that divides 66 without a remainder.

1, 2, 3, 6, 11, 22, 33, 66

Divisors of 15

List of positive integer divisors of 15 that divides 15 without a remainder.

1, 3, 5, 15

Divisors of 70

List of positive integer divisors of 70 that divides 70 without a remainder.

1, 2, 5, 7, 10, 14, 35, 70

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 66, 15, 70, 25 . The biggest common divisior number is the GCD number.
So the Greatest Common Divisior 66, 15, 70, 25 is 1.

Therefore, GCD of numbers 66, 15, 70, 25 is 1

Given Input Data is 66, 15, 70, 25

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

Prime Factorization of 66 is 2 x 3 x 11

Prime Factorization of 15 is 3 x 5

Prime Factorization of 70 is 2 x 5 x 7

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(66, 15) = 330

GCD(66, 15) = ( 66 x 15 ) / 330

GCD(66, 15) = 990 / 330

GCD(66, 15) = 3

Step2:

Here we consider the GCD from the above i.e. 3 as first number and the next as 70

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

LCM(3, 70) = 210

GCD(3, 70) = ( 3 x 70 ) / 210

GCD(3, 70) = 210 / 210

GCD(3, 70) = 1

Step3:

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

GCD of 66, 15, 70, 25 is 1

Here are some samples of GCD of Numbers calculations.

• GCD of 59, 11, 73, 40
• GCD of 18, 77, 26, 37
• GCD of 96, 42, 74, 62
• GCD of 78, 26, 81, 81
• GCD of 11, 89, 69, 20

1. What is the GCD of 66, 15, 70, 25?

GCD of 66, 15, 70, 25 is 1

2. Where do I get the detailed procedure to find GCD of 66, 15, 70, 25?

You can find a detailed procedure to find GCD of 66, 15, 70, 25 on our page.

3. How to find GCD of 66, 15, 70, 25 on a calculator?

You can find the GCD of 66, 15, 70, 25 by simply giving the inputs separated by commas and click on the calculate button to avail the Greatest Common Divisor in less time.