Logic Riddles

 
Stove (medium)

Question: A man wants to start a forest fire.There are 80 trees and you have a lighter. How many trees should he burn?


which state (medium)

Question: Which state can you leave or enter without changing your address?

Question: What person sees a funny action and hears a funny word but cannot laugh?

Question: What comes up but never comes down?

Longest WoRD (medium)

Question: What's the longest word in the dictionary?