Question: There are three words in the English language that end with the letters 'g', 'r', and 'y'. Two are "hungry" and "angry." The third word is something everyone uses every day. Everyone knows what the third word means. What is the third word?
Answer: The answer is "energy." The riddle says that the word ends in the letters g-r-y; it says nothing about the order of the letters. Many words end with "-rgy," but energy is something everyone uses every day
Question: A semi truck weighing exactly 10,000 pounds gets onto a bridge that is 100 miles long. The bridge's weight limit is exactly 10,000 pounds, any more will break the bridge. After going about 80 miles down the bridge a small bird lands on the truck.
Answer: Nothing, after traveling 80 miles the truck will have surely burnt enough fuel to allow the bird to land on the truck without breaking the bridge.