GCD of 10, 45, 81, 20 Calculator
Reviewed By : Phani Ponnapalli
Last Updated at : Mar 29,2023
Online GCD Calculator is useful to find the GCD of 10, 45, 81, 20 quickly. Get the easiest ways to solve the greatest common divisor of 10, 45, 81, 20 i.e 1 in different methods as follows.
Given Input numbers are 10, 45, 81, 20
In the factoring method, we have to find the divisors of all numbers
Divisors of 10 :
The positive integer divisors of 10 that completely divides 10 are.
1, 2, 5, 10
Divisors of 45 :
The positive integer divisors of 45 that completely divides 45 are.
1, 3, 5, 9, 15, 45
Divisors of 81 :
The positive integer divisors of 81 that completely divides 81 are.
1, 3, 9, 27, 81
Divisors of 20 :
The positive integer divisors of 20 that completely divides 20 are.
1, 2, 4, 5, 10, 20
GCD of numbers is the greatest common divisor
So, the GCD (10, 45, 81, 20) = 1.
Given numbers are 10, 45, 81, 20
The list of prime factors of all numbers are
Prime factors of 10 are 2 x 5
Prime factors of 45 are 3 x 3 x 5
Prime factors of 81 are 3 x 3 x 3 x 3
Prime factors of 20 are 2 x 2 x 5
The above numbers do not have any common prime factor. So GCD is 1
Steps to Calculate GCD of 10, 45, 81, 20 using LCM Formula
Given numbers are 10, 45, 81, 20
GCD of 2 numbers formula is GCD(a, b) = ( a x b) / LCM(a, b)
Apply this formula for all numbers.
Step1:
LCM(10, 45) = 90
GCD(10, 45) = ( 10 x 45 ) / 90
= 10 / 45
= 10
Step2:
LCM(5, 81) = 405
GCD(5, 81) = ( 5 x 81 ) / 405
= 5 / 81
= 5
Step3:
LCM(1, 20) = 20
GCD(1, 20) = ( 1 x 20 ) / 20
= 1 / 20
= 1
So, Greatest Common Divisor of 10, 45, 81, 20 is 1
GCD of Numbers Calculation Examples
Here are some samples of GCD of Numbers calculations.
Greatest Common Divisor of 10, 45, 81, 20
Given numbers are 10, 45, 81, 20
The greatest common divisor of numbers 10, 45, 81, 20 can be found in various methods such as the LCM formula, factoring, and prime factorization. The GCD of numbers 10, 45, 81, 20 is 1.
FAQs on GCD of 10, 45, 81, 20 Calculator
1. What is the GCD of 10, 45, 81, 20?
GCD of given numbers 10, 45, 81, 20 is 1
2. How to calculate the greatest common divisor of 10, 45, 81, 20?
We can find the highest common divisor of 10, 45, 81, 20 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 10, 45, 81, 20 i.e 1.
3. How can I use the GCD of 10, 45, 81, 20Calculator?
Out the numbers 10, 45, 81, 20 into the GCD calculator and hit the calculate button to get the greatest common divisor as result.