Solution to an asinine codegolf challenge (http://codegolf.stackexchange.com/questions/62454/five-very-simple-challenges)

getfukt.py

# 1
print('Hello, World!')

# 2
from math import factorial as f
print(str(f(int(input()))))

# 3
def p(N):r=range(2,N);return sum(x for x in r if sum(x%d==0 for d in r)<2)

# 4
def U():
    Q=[]
    for T in input().lower():
        if T not in Q and not T.isspace():Q+=[T]
    return "".join(Q)

# 5
print("   *   \n  ***  \n ***** \n*******\n ***** \n  ***  \n   *   \n")