Greatest Common Divisor (GCD) of 6, 18 and 42

The Greatest Common Divisor (GCD) of 6, 18 and 42 is the largest positive integer that equally divides all three numbers: 6, 18 and 42. Mathematically, the problem we are solving is:

GCD(6,18,42)

To solve the problem, we will list all the positive integers (divisors) that can be divided into 6, 18 and 42. We will then compare the lists of divisors to find the greatest divisor they have in common.

Divisors of 6:
1, 2, 3, and 6.

Divisors of 18:
1, 2, 3, 6, 9, and 18.

Divisors of 42:
1, 2, 3, 6, 7, 14, 21, and 42.

When we compare the lists of divisors above, we see that the largest number they have in common is 6. Thus, the Greatest Common Divisor (GCD) of 6, 18 and 42 is:

GCD(6,18,42) = 6

Greatest Common Divisor Calculator
Please enter another two or three numbers below so we can calculate the Greatest Common Divisor (GCD) for you:

Greatest Common Divisor (GCD) of 6, 18 and 43
Go here for the next set of numbers that we calculated the Greatest Common Divisor for.