What building has the most stories?
What 5-letter word typed in all capital letters can be read the same upside down?
How far can you walk into the woods?
There was a strange boy who was born before his father. How can this be possible?
Which is the rope you never skip with?
Why do Chinese men eat more rice than Japanese men do ?
Why is a river so rich ?
What is harder to catch the faster you run?
What time is it when an elephant sits on a fence?
If two's company, and three's a crowd, then whats four and five ?
Rearrange the letters in "new door" to make one word.
There is a cryptic organization called Cicada 3301 that posts challenging puzzles online, possibly to recruit codebreakers and linguists.