Four men were in a boat on the lake. The boat turns over, and all four men sink to the bottom of the lake, yet not a single man got wet! Why?

Move four matchsticks to the below square to form three squares?

John went to meet his friend Jacob, but when he was about to reach the main gate, John notices that Jacob had a mighty dog who was fastened to the tree. The chain is long enough that it allows the dog to reach the main gate.

How can the John reach the main gate?

Can you think of any three-dimensional shape that comprises of exactly two surfaces?

What building has the most stories?

Always in you, Sometimes on you;

If I surround you, I can kill you.

What am I?

Which city is three-fifths chick two third cat and 50% goat?

Replace the letters of words with a number so that the below equation holds true

BASE +
BALL
---------
GAMES
----------

There is one four-digit whole number n, such that the last four digits of n2 are the original number n

What came first, the chicken or the egg?