In the prep swift video you have the example problem:

“Find multiples of 5 in the interval 105-355 (inclusive)”

-We determine that each pair adds up to 460 ✓

-We determine that there are an odd number of multiples (51: 25 pairs + 1 extra in the middle) ✓

-But then you say to solve we need to determine what that middle number is and add it in to (460x25). But isn’t it simpler if we just do 460 x 25.5? Is there a reason to not do this? It seems that the answer is the same.

Thank you!