Are you up for another riddle? Do you see the glass half empty of half full?
You are in an empty room and you have a transparent glass of water. The glass is a right cylinder, and it looks like it’s half full, but you’re not sure. How can you accurately figure out whether the glass is half full, more than half full, or less than half full? You have no rulers or writing utensils.
Hint 3: Don’t drink the water. ^_^