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.
Doesn't this mean we are summing the numbers that are divisible by 3 or 5, and filtering out the ones that are not? This also appears consistent with the logic in the provided solutions:
There may be a possible typo in the exercise description and solution comments. From the Project Euler problem statement:
Doesn't this mean we are summing the numbers that are divisible by 3 or 5, and filtering out the ones that are not? This also appears consistent with the logic in the provided solutions: