Why do people go to bed?
Why is it very easy to weigh a fish?
How can you make a TV, a bed, a dog, and a car liquid?
How many words can a pen with half refill write?
What does Alexander the Great and Winnie the Pooh have in common?
How is the moon similar to a dollar?
Which city is three-fifths chick two third cat and 50% goat?
You are on a Boat in the mid of a river. You have two cigarettes with you. One of these two you have to light, how will you light the cigarette?
What do you call a fish without an eye?
What time is it when an elephant sits on a fence?
A seven-year-old kid challenged his classmates that he can make the number one disappear by adding something to it. How can he do that?
There is a cryptic organization called Cicada 3301 that posts challenging puzzles online, possibly to recruit codebreakers and linguists.