# GCD(978,320) Calculation:

Find the greatest common divisor of 978 and 320 numbers :

## Solution

GCD(978,320)= 2

**978 Factors :** 1, 2, 3, 6, 163, 326, 489,978

**320 Factors :** 1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 160,320

The greatest common divisor is __2__

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## Calculate GCD Of Numbers

The greatest common divisor, or GCD, is a very important concept in math. It is the largest number that divides two or more numbers without leaving a remainder. In simpler terms, the GCD is the biggest number that can go into two or more numbers evenly.

To calculate the GCD of two or more numbers, there are several methods we can use. One of the most commonly used methods is the Euclidean algorithm. This involves dividing the larger number by the smaller number and taking the remainder. This process is repeated until the remainder is zero. The last non-zero remainder is the GCD.

For example, let's find the GCD of 24 and 36 using the Euclidean algorithm. We first divide 36 by 24 to get a quotient of 1 and a remainder of 12. We then divide 24 by 12 to get a quotient of 2 and a remainder of 0. Since the remainder is 0, we know that the GCD is 12.

Another method for finding the GCD is prime factorization. To use this method, we first find the prime factors of each number. We then identify the common factors and multiply them together to get the GCD.

For example, let's find the GCD of 12 and 18 using prime factorization. The prime factors of 12 are 2 x 2 x 3, and the prime factors of 18 are 2 x 3 x 3. The common factors are 2 and 3, so the GCD is 2 x 3 = 6.

The GCD is used in many areas of math, including fractions, simplifying expressions, and solving equations. Knowing how to calculate the GCD is an important skill for any math student to have.

Let's see **GCD calculator** with steps...

## GCD Calculation Methods

The greatest common divisor (GCD) of two or more numbers is the largest positive integer that divides each of them without a remainder. There are several methods to calculate the GCD of two or more numbers:

- Euclidean algorithm: This is the most commonly used method for finding the GCD of two numbers. It involves repeatedly dividing the larger number by the smaller number and taking the remainder until the remainder is zero. The last non-zero remainder is the GCD. For example, to find the GCD of 84 and 60:

84 = 1 x 60 + 24

60 = 2 x 24 + 12

24 = 2 x 12 + 0

Therefore, GCD(84, 60) = 12. - Prime factorization: This method involves finding the prime factors of each number and then identifying the common factors. For example, to find the GCD of 36 and 48:

36 = 2^2 x 3^2

48 = 2^4 x 3^1

The common factors are 2^2 and 3^1, so GCD(36, 48) = 2^2 x 3^1 = 12. - Binary GCD algorithm: This method involves repeatedly dividing both numbers by 2 until one or both become odd, then subtracting the smaller odd number from the larger one, and then dividing the result by 2 until one or both become even. This process is repeated until the two numbers become equal, at which point the GCD is equal to the common power of 2. For example, to find the GCD of 84 and 60:

84 = 2^2 x 21

60 = 2^2 x 15

(subtract the smaller odd number from the larger one)

21 = 3 x 7

15 = 3 x 5

(subtract the smaller odd number from the larger one)

6 = 2 x 3

(common power of 2 is 2^2)

Therefore, GCD(84, 60) = 2^2 x 3 = 12.

## How to calculate gcd of two numbers using calculator?

Many calculators have a built-in function to calculate the greatest common divisor (GCD) of two numbers. Here are the steps to calculate the GCD of two numbers using a calculator:

- Enter the first number into the calculator.
- Press the "GCD" or "gcd" button on your calculator.
- Enter the second number into the calculator.
- Press the "=" button to see the GCD of the two numbers.

If your calculator does not have a built-in GCD function, you can still calculate the GCD by using the prime factorization method or the Euclidean algorithm. There are also online GCD calculators that you can use if you don't have access to a calculator with a GCD function.