def pe005():
"""Find the smallest positive number that is divisible by range[1, 20]"""
from tools import isDivisibleBy
num = 2520
while not reduce(lambda x, y: isDivisibleBy(num, y) and x,
xrange(11, 21),
True):
num += 2520
return num
def pe001():
"""Find the sum of all multiples of 3 or 5 below 1000"""
from tools import isDivisibleBy
return sum(filter(lambda x: isDivisibleBy(x, 3) or isDivisibleBy(x, 5),
xrange(0, 1000)))