Online GCD Calculator is useful to find the GCD of 81, 78, 75, 48 quickly. Get the easiest ways to solve the greatest common divisor of 81, 78, 75, 48 i.e 3 in different methods as follows.

Given Input numbers are 81, 78, 75, 48

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

**Divisors of 81 :**

The positive integer divisors of 81 that completely divides 81 are.

1, 3, 9, 27, 81

**Divisors of 78 :**

The positive integer divisors of 78 that completely divides 78 are.

1, 2, 3, 6, 13, 26, 39, 78

**Divisors of 75 :**

The positive integer divisors of 75 that completely divides 75 are.

1, 3, 5, 15, 25, 75

**Divisors of 48 :**

The positive integer divisors of 48 that completely divides 48 are.

1, 2, 3, 4, 6, 8, 12, 16, 24, 48

GCD of numbers is the greatest common divisor

** So, the GCD (81, 78, 75, 48) = 3**.

Given numbers are 81, 78, 75, 48

The list of prime factors of all numbers are

Prime factors of 81 are 3 x 3 x 3 x 3

Prime factors of 78 are 2 x 3 x 13

Prime factors of 75 are 3 x 5 x 5

Prime factors of 48 are 2 x 2 x 2 x 2 x 3

The highest common occurrence is 3^{1}

**Therefore, GCD of 81, 78, 75, 48 is 3.**

Given numbers are 81, 78, 75, 48

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

Apply this formula for all numbers.

**Step1:**

LCM(81, 78) = 2106

GCD(81, 78) = ( 81 x 78 ) / 2106

= 81 / 78

= 81

**Step2:**

LCM(3, 75) = 75

GCD(3, 75) = ( 3 x 75 ) / 75

= 3 / 75

= 3

**Step3:**

LCM(3, 48) = 48

GCD(3, 48) = ( 3 x 48 ) / 48

= 3 / 48

= 3

**So, Greatest Common Divisor of 81, 78, 75, 48 is 3**

Here are some samples of GCD of Numbers calculations.

Given numbers are 81, 78, 75, 48

The greatest common divisor of numbers 81, 78, 75, 48 can be found in various methods such as the LCM formula, factoring, and prime factorization. The GCD of numbers 81, 78, 75, 48 is 3.

**1. What is the GCD of 81, 78, 75, 48?**

GCD of given numbers 81, 78, 75, 48 is 3

**2. How to calculate the greatest common divisor of 81, 78, 75, 48?**

We can find the highest common divisor of 81, 78, 75, 48 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 81, 78, 75, 48 i.e 3.

**3. How can I use the GCD of 81, 78, 75, 48Calculator?**

Out the numbers 81, 78, 75, 48 into the GCD calculator and hit the calculate button to get the greatest common divisor as result.