GCD of 10, 42, 84, 15 Calculator

Given Input numbers are 10, 42, 84, 15

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

Divisors of 10

List of positive integer divisors of 10 that divides 10 without a remainder.

1, 2, 5, 10

Divisors of 42

List of positive integer divisors of 42 that divides 42 without a remainder.

1, 2, 3, 6, 7, 14, 21, 42

Divisors of 84

List of positive integer divisors of 84 that divides 84 without a remainder.

1, 2, 3, 4, 6, 7, 12, 14, 21, 28, 42, 84

Divisors of 15

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

1, 3, 5, 15

Greatest Common Divisior

We found the divisors of 10, 42, 84, 15 . The biggest common divisior number is the GCD number.
So the Greatest Common Divisior 10, 42, 84, 15 is 1.

Therefore, GCD of numbers 10, 42, 84, 15 is 1

Given Input Data is 10, 42, 84, 15

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

Prime Factorization of 10 is 2 x 5

Prime Factorization of 42 is 2 x 3 x 7

Prime Factorization of 84 is 2 x 2 x 3 x 7

Prime Factorization of 15 is 3 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(10, 42) = 210

GCD(10, 42) = ( 10 x 42 ) / 210

GCD(10, 42) = 420 / 210

GCD(10, 42) = 2

Step2:

Here we consider the GCD from the above i.e. 2 as first number and the next as 84

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

LCM(2, 84) = 84

GCD(2, 84) = ( 2 x 84 ) / 84

GCD(2, 84) = 168 / 84

GCD(2, 84) = 2

Step3:

Here we consider the GCD from the above i.e. 2 as first number and the next as 15

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

LCM(2, 15) = 30

GCD(2, 15) = ( 2 x 15 ) / 30

GCD(2, 15) = 30 / 30

GCD(2, 15) = 1

GCD of 10, 42, 84, 15 is 1

Here are some samples of GCD of Numbers calculations.

• GCD of 58, 22, 78, 99
• GCD of 47, 64, 73, 96
• GCD of 80, 75, 85, 81
• GCD of 55, 76, 68, 84
• GCD of 87, 87, 11, 96

1. What is the GCD of 10, 42, 84, 15?

GCD of 10, 42, 84, 15 is 1

2. Where do I get the detailed procedure to find GCD of 10, 42, 84, 15?

You can find a detailed procedure to find GCD of 10, 42, 84, 15 on our page.

3. How to find GCD of 10, 42, 84, 15 on a calculator?

You can find the GCD of 10, 42, 84, 15 by simply giving the inputs separated by commas and click on the calculate button to avail the Greatest Common Divisor in less time.