<!> SPOILER <!> Project Euler Q1

# My First Successful Attempt (made by self)
def multiples(x,r):
    ans = 0
    i = 0
    ret = []
    while True:
        ans = i * x
        if ans in range(r):
            ret.append(ans)
        else:
            return ret
            break
        i += 1
print(sum(list(set(multiples(3,1000) + multiples(5,1000)))))

# My Second Successful Attempt (used some help)
print(sum([i for i in range(1, 1000) if any(i % factor == 0 for factor in [3, 5])]))

# My Third Successful Attempt (made by self)
a=[]
for factor in [3,5]:
    for l in range(1,1000):
        if l%factor==0:
            a.append(l)
print(sum(list(set(a))))