30 Riddles Only The Most Intelligent Minds Can Answer
Take me out of a window, and I leave a grieving wife. But stick me in a door, and I can save somebody's life. What am I?
13. What gets bigger the more you take away from it?
A hole.
14. What is lighter than air, can be seen with eyes unaided, and when put into a barrel, will make it easier to lift?
A hole.