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.
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all_numbers = range[:1000]
multiples = []
for variable in all_numbers:
if variable %3 == 0 or variable %5 == 0:
multiples.append
print multiples.sum
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# This cell will be used for grading, leave it at the end of the notebook.
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