GCD of Three Numbers

Find the Greatest Common Divisor of three numbers at once.

Number A

Number B

Number C

How It Works

Enter three positive integers. The tool computes GCD(a,b) first using the Euclidean algorithm, then computes GCD of that result with c.

Formula

GCD(a, b, c) = GCD(GCD(a, b), c)

Frequently Asked Questions

What is GCD(12, 18, 24)?

GCD(12,18)=6, then GCD(6,24)=6. So GCD(12,18,24) = 6.

Can GCD of three numbers be 1?

Yes. For example GCD(6, 10, 15) = 1, even though each pair shares a common factor.