So, I’m starting this much sooner than I would have anticipated but I suddenly got the urge to start.
Problem 1 is pretty straight forward:
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.
