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If we list all the natural numbers below 10 that are multiples of 3 or 5, we get 3, 5, 6 and 9. The sum of these multiples is 23.
Find the sum of all the multiples of 3 or 5 below 1000.
In [1]: print(sum(k for k in range(1000) if k % 3 == 0 or k % 5 == 0))
print(sum(k for k in range(1000) if k % 3 == 0 or k % 5 == 0))
233168
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