Why do you find that most of the buildings are deprived of the 13th floor?
I have no doors but I have keys, I have no rooms but I have space, you can enter but you can’t leave! What am I?
How can a man go eight days without sleep?
What do you call a fish without an eye?
If you had a pizza with crust thickness 'a' and radius 'z', what's the volume of the pizza?
A woman who works in a sweet shop has a measurement of 32-26-36, is 5"4" tall, and wears size "6" shoes. What do you think she weighs?
What can go up a chimney down, but can’t go down a chimney up?
What time is it when an elephant sits on a fence?
Who are the happiest people in IPL match?
How is the moon similar to a dollar?
How many words can a quill made with the feather of a pigeon write with a 100ml bottle of black ink?
There is a cryptic organization called Cicada 3301 that posts challenging puzzles online, possibly to recruit codebreakers and linguists.
