GCD of 60, 65, 20, 21 Calculator
Reviewed By : Phani Ponnapalli
Last Updated at : Mar 29,2023
Online GCD Calculator is useful to find the GCD of 60, 65, 20, 21 quickly. Get the easiest ways to solve the greatest common divisor of 60, 65, 20, 21 i.e 1 in different methods as follows.
Given Input numbers are 60, 65, 20, 21
In the factoring method, we have to find the divisors of all numbers
Divisors of 60 :
The positive integer divisors of 60 that completely divides 60 are.
1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60
Divisors of 65 :
The positive integer divisors of 65 that completely divides 65 are.
1, 5, 13, 65
Divisors of 20 :
The positive integer divisors of 20 that completely divides 20 are.
1, 2, 4, 5, 10, 20
Divisors of 21 :
The positive integer divisors of 21 that completely divides 21 are.
1, 3, 7, 21
GCD of numbers is the greatest common divisor
So, the GCD (60, 65, 20, 21) = 1.
Given numbers are 60, 65, 20, 21
The list of prime factors of all numbers are
Prime factors of 60 are 2 x 2 x 3 x 5
Prime factors of 65 are 5 x 13
Prime factors of 20 are 2 x 2 x 5
Prime factors of 21 are 3 x 7
The above numbers do not have any common prime factor. So GCD is 1
Steps to Calculate GCD of 60, 65, 20, 21 using LCM Formula
Given numbers are 60, 65, 20, 21
GCD of 2 numbers formula is GCD(a, b) = ( a x b) / LCM(a, b)
Apply this formula for all numbers.
Step1:
LCM(60, 65) = 780
GCD(60, 65) = ( 60 x 65 ) / 780
= 60 / 65
= 60
Step2:
LCM(5, 20) = 20
GCD(5, 20) = ( 5 x 20 ) / 20
= 5 / 20
= 5
Step3:
LCM(5, 21) = 105
GCD(5, 21) = ( 5 x 21 ) / 105
= 5 / 21
= 5
So, Greatest Common Divisor of 60, 65, 20, 21 is 1
GCD of Numbers Calculation Examples
Here are some samples of GCD of Numbers calculations.
Greatest Common Divisor of 60, 65, 20, 21
Given numbers are 60, 65, 20, 21
The greatest common divisor of numbers 60, 65, 20, 21 can be found in various methods such as the LCM formula, factoring, and prime factorization. The GCD of numbers 60, 65, 20, 21 is 1.
FAQs on GCD of 60, 65, 20, 21 Calculator
1. What is the GCD of 60, 65, 20, 21?
GCD of given numbers 60, 65, 20, 21 is 1
2. How to calculate the greatest common divisor of 60, 65, 20, 21?
We can find the highest common divisor of 60, 65, 20, 21 easily using the prime factorization method. Just list the prime factors of all numbers and pick the highest common factor which is the GCD of 60, 65, 20, 21 i.e 1.
3. How can I use the GCD of 60, 65, 20, 21Calculator?
Out the numbers 60, 65, 20, 21 into the GCD calculator and hit the calculate button to get the greatest common divisor as result.