How to find the GCD/HCF of three numbers in Python3

Question

I need a code to find the common prime factors of three numbers in Python 3

Whenever I run it shows me the wrong HCF / GCD.

Answer 1

Very simple.
Write a function, that calculates gcd/lcm of two numbers.
Then do something like this.

gcd(a,b,c) = gcd(a, gcd(b,c))

 >>> def gcd(a,b):
...     if b == 0:
...             return a
...     else:
...             return gcd(b, a%b)
... 
>>> gcd(3,5)
1
>>> gcd(10,5)
5
>>> gcd(10,15)
5
>>> gcd(5,gcd(10,15))
5

You can try by yourself, for lcm.