GCD of 70, 21, 90 Calculator
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 70, 21, 90 i.e. 1 largest integer that divides all the numbers equally.
GCD of 70, 21, 90 is 1
GCD(70, 21, 90) = 1
Ex: 10, 15, 20 (or) 24, 48, 96,45 (or) 78902, 89765, 12345
GCD of numbers 70, 21, 90 is 1
GCD(70, 21, 90) = 1
GCDof 70,21,90 is 1
Given Input numbers are 70, 21, 90
To find the GCD of numbers using factoring list out all the divisors of each number
Divisors of 70
List of positive integer divisors of 70 that divides 70 without a remainder.
1, 2, 5, 7, 10, 14, 35, 70
Divisors of 21
List of positive integer divisors of 21 that divides 21 without a remainder.
1, 3, 7, 21
Divisors of 90
List of positive integer divisors of 90 that divides 90 without a remainder.
1, 2, 3, 5, 6, 9, 10, 15, 18, 30, 45, 90
Greatest Common Divisior
We found the divisors of 70, 21, 90 . The biggest common divisior number is the GCD number.
So the Greatest Common Divisior 70, 21, 90 is 1.
Therefore, GCD of numbers 70, 21, 90 is 1
Given Input Data is 70, 21, 90
Make a list of Prime Factors of all the given numbers initially
Prime Factorization of 70 is 2 x 5 x 7
Prime Factorization of 21 is 3 x 7
Prime Factorization of 90 is 2 x 3 x 3 x 5
The above numbers do not have any common prime factor. So GCD is 1
Finding GCD of 70, 21, 90 using LCM Formula
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(70, 21) = 210
GCD(70, 21) = ( 70 x 21 ) / 210
GCD(70, 21) = 1470 / 210
GCD(70, 21) = 7
Step2:
Here we consider the GCD from the above i.e. 7 as first number and the next as 90
The formula of GCD is GCD(a, b) = ( a x b) / LCM(a, b)
LCM(7, 90) = 630
GCD(7, 90) = ( 7 x 90 ) / 630
GCD(7, 90) = 630 / 630
GCD(7, 90) = 1
GCD of 70, 21, 90 is 1
GCD of Numbers Calculation Examples
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FAQs on GCD of numbers 70, 21, 90
1. What is the GCD of 70, 21, 90?
GCD of 70, 21, 90 is 1
2. Where do I get the detailed procedure to find GCD of 70, 21, 90?
You can find a detailed procedure to find GCD of 70, 21, 90 on our page.
3. How to find GCD of 70, 21, 90 on a calculator?
You can find the GCD of 70, 21, 90 by simply giving the inputs separated by commas and click on the calculate button to avail the Greatest Common Divisor in less time.