Project Euler #6 - Sum square difference  (Python)
Leetness: -2  

def gcd(a,b):
    if b == 0:
        return a;
    return gcd(b, a % b)

def lcm(a,b):
    return (a * b) / gcd(a,b)

def fn0():
    return reduce(lcm, range(1,21))

     
Submitted on May 02, 2013 by Anonymous
https://github.com/tristan/project-euler-code