GCD of 99, 90, 21 Calculator

Given Input numbers are 99, 90, 21

In the factoring method, we have to find the divisors of all numbers

Divisors of 99 :

The positive integer divisors of 99 that completely divides 99 are.

1, 3, 9, 11, 33, 99

Divisors of 90 :

The positive integer divisors of 90 that completely divides 90 are.

1, 2, 3, 5, 6, 9, 10, 15, 18, 30, 45, 90

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 (99, 90, 21) = 3.

Given numbers are 99, 90, 21

The list of prime factors of all numbers are

Prime factors of 99 are 3 x 3 x 11

Prime factors of 90 are 2 x 3 x 3 x 5

Prime factors of 21 are 3 x 7

The highest common occurrence is 3¹

Therefore, GCD of 99, 90, 21 is 3.

Given numbers are 99, 90, 21

GCD of 2 numbers formula is GCD(a, b) = ( a x b) / LCM(a, b)

Apply this formula for all numbers.

Step1:

LCM(99, 90) = 990

GCD(99, 90) = ( 99 x 90 ) / 990

= 99 / 90

= 99

Step2:

LCM(9, 21) = 63

GCD(9, 21) = ( 9 x 21 ) / 63

= 9 / 21

= 9

So, Greatest Common Divisor of 99, 90, 21 is 3

Here are some samples of GCD of Numbers calculations.

• GCD of 55, 61, 53
• GCD of 45, 59, 65
• GCD of 28, 51, 94
• GCD of 84, 70, 69
• GCD of 61, 26, 65

Given numbers are 99, 90, 21
The greatest common divisor of numbers 99, 90, 21 can be found in various methods such as the LCM formula, factoring, and prime factorization. The GCD of numbers 99, 90, 21 is 3.

1. What is the GCD of 99, 90, 21?

GCD of given numbers 99, 90, 21 is 3

2. How to calculate the greatest common divisor of 99, 90, 21?

We can find the highest common divisor of 99, 90, 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 99, 90, 21 i.e 3.

3. How can I use the GCD of 99, 90, 21Calculator?

Out the numbers 99, 90, 21 into the GCD calculator and hit the calculate button to get the greatest common divisor as result.