Created By : Jatin Gogia
Reviewed By : Rajasekhar Valipishetty
Last Updated : Apr 06, 2023
Make use of GCD Calculator to determine the Greatest Common Divisor of 63, 21, 55, 15 i.e. 1 largest integer that divides all the numbers equally.
GCD of 63, 21, 55, 15 is 1
GCD(63, 21, 55, 15) = 1
Ex: 10, 15, 20 (or) 24, 48, 96,45 (or) 78902, 89765, 12345
GCD of numbers 63, 21, 55, 15 is 1
GCD(63, 21, 55, 15) = 1
Given Input numbers are 63, 21, 55, 15
To find the GCD of numbers using factoring list out all the divisors of each number
Divisors of 63
List of positive integer divisors of 63 that divides 63 without a remainder.
1, 3, 7, 9, 21, 63
Divisors of 21
List of positive integer divisors of 21 that divides 21 without a remainder.
1, 3, 7, 21
Divisors of 55
List of positive integer divisors of 55 that divides 55 without a remainder.
1, 5, 11, 55
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 63, 21, 55, 15 . The biggest common divisior number is the GCD number.
So the Greatest Common Divisior 63, 21, 55, 15 is 1.
Therefore, GCD of numbers 63, 21, 55, 15 is 1
Given Input Data is 63, 21, 55, 15
Make a list of Prime Factors of all the given numbers initially
Prime Factorization of 63 is 3 x 3 x 7
Prime Factorization of 21 is 3 x 7
Prime Factorization of 55 is 5 x 11
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(63, 21) = 63
GCD(63, 21) = ( 63 x 21 ) / 63
GCD(63, 21) = 1323 / 63
GCD(63, 21) = 21
Step2:
Here we consider the GCD from the above i.e. 21 as first number and the next as 55
The formula of GCD is GCD(a, b) = ( a x b) / LCM(a, b)
LCM(21, 55) = 1155
GCD(21, 55) = ( 21 x 55 ) / 1155
GCD(21, 55) = 1155 / 1155
GCD(21, 55) = 1
Step3:
Here we consider the GCD from the above i.e. 1 as first number and the next as 15
The formula of GCD is GCD(a, b) = ( a x b) / LCM(a, b)
LCM(1, 15) = 15
GCD(1, 15) = ( 1 x 15 ) / 15
GCD(1, 15) = 15 / 15
GCD(1, 15) = 1
GCD of 63, 21, 55, 15 is 1
Here are some samples of GCD of Numbers calculations.
1. What is the GCD of 63, 21, 55, 15?
GCD of 63, 21, 55, 15 is 1
2. Where do I get the detailed procedure to find GCD of 63, 21, 55, 15?
You can find a detailed procedure to find GCD of 63, 21, 55, 15 on our page.
3. How to find GCD of 63, 21, 55, 15 on a calculator?
You can find the GCD of 63, 21, 55, 15 by simply giving the inputs separated by commas and click on the calculate button to avail the Greatest Common Divisor in less time.