Lizzy: James dumps his whole collection of 500 Legos on the floor and starts building a castle out of them. He uses half the pieces before finishing and is told to put the rest away. He puts all of the leftover pieces back in the box they came from, except for 5 missing pieces that he can't find. How many Legos are in the box at the end?.
Me: Hmmm, let me think. I think this is the detailed solution:
James starts with 500 Legos and uses half of them, leaving 500 / 2 = 250 Legos unused. He puts those unused Legos away but since he's missing 5 he only puts 250 - 5 = 245 Legos away. Final answer: 245.