GCD of 91, 70, 81, 65 Calculator
Reviewed By : Phani Ponnapalli
Last Updated at : Mar 29,2023
Online GCD Calculator is useful to find the GCD of 91, 70, 81, 65 quickly. Get the easiest ways to solve the greatest common divisor of 91, 70, 81, 65 i.e 1 in different methods as follows.
Given Input numbers are 91, 70, 81, 65
In the factoring method, we have to find the divisors of all numbers
Divisors of 91 :
The positive integer divisors of 91 that completely divides 91 are.
1, 7, 13, 91
Divisors of 70 :
The positive integer divisors of 70 that completely divides 70 are.
1, 2, 5, 7, 10, 14, 35, 70
Divisors of 81 :
The positive integer divisors of 81 that completely divides 81 are.
1, 3, 9, 27, 81
Divisors of 65 :
The positive integer divisors of 65 that completely divides 65 are.
1, 5, 13, 65
GCD of numbers is the greatest common divisor
So, the GCD (91, 70, 81, 65) = 1.
Given numbers are 91, 70, 81, 65
The list of prime factors of all numbers are
Prime factors of 91 are 7 x 13
Prime factors of 70 are 2 x 5 x 7
Prime factors of 81 are 3 x 3 x 3 x 3
Prime factors of 65 are 5 x 13
The above numbers do not have any common prime factor. So GCD is 1
Steps to Calculate GCD of 91, 70, 81, 65 using LCM Formula
Given numbers are 91, 70, 81, 65
GCD of 2 numbers formula is GCD(a, b) = ( a x b) / LCM(a, b)
Apply this formula for all numbers.
Step1:
LCM(91, 70) = 910
GCD(91, 70) = ( 91 x 70 ) / 910
= 91 / 70
= 91
Step2:
LCM(7, 81) = 567
GCD(7, 81) = ( 7 x 81 ) / 567
= 7 / 81
= 7
Step3:
LCM(1, 65) = 65
GCD(1, 65) = ( 1 x 65 ) / 65
= 1 / 65
= 1
So, Greatest Common Divisor of 91, 70, 81, 65 is 1
GCD of Numbers Calculation Examples
Here are some samples of GCD of Numbers calculations.
Greatest Common Divisor of 91, 70, 81, 65
Given numbers are 91, 70, 81, 65
The greatest common divisor of numbers 91, 70, 81, 65 can be found in various methods such as the LCM formula, factoring, and prime factorization. The GCD of numbers 91, 70, 81, 65 is 1.
FAQs on GCD of 91, 70, 81, 65 Calculator
1. What is the GCD of 91, 70, 81, 65?
GCD of given numbers 91, 70, 81, 65 is 1
2. How to calculate the greatest common divisor of 91, 70, 81, 65?
We can find the highest common divisor of 91, 70, 81, 65 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 91, 70, 81, 65 i.e 1.
3. How can I use the GCD of 91, 70, 81, 65Calculator?
Out the numbers 91, 70, 81, 65 into the GCD calculator and hit the calculate button to get the greatest common divisor as result.