Fun Riddles

Question: There are five people at a table and a pie sliced into 5 pieces. Each person has a piece of pie in front of them, yet the pie tin still has a piece of pie in it. How is this possible?

Question: What is the only question you can't answer yes to?

Question: How can "L" be greater in size than "XL"?

Question: Can you name three consecutive days without using the words Wednesday, Friday, or Sunday?

Question: You create your own Where's Waldo game on a piece of paper. You want your friend to find Waldo but they think you might be pulling a prank on them by not putting Waldo on the paper at all.

How can you prove to your friend that Waldo is on the paper without ruining it for them?