Marital problem
- I have an unlimited supply of 3×3 and 7×7 squares.
- I have always envied you that!
- The squares?
- No, what you do with them.
- What do I do with them?
- You tile them to together to make bigger squares.
- How did you know?
- I can see it in the way you walk.
- Is it that obvious?
- Out with it, what is the problem?
- With my 3 and 7 squares I can only make some bigger squares. Which? What do they have in common?
- Is that all?
- My wife has squares of side 2, 7, and 11. What is the smallest square these can tile if its side is not a multiple of 2, 7, or 11?
- You ask me?
- No, my wife asks me.
- Why did you marry her?