Once while in his court, King Akbar asked Birbal to write something on a wall that makes one sad when read in good times and makes one happy when read in sad times.

He took only a few moment and wrote something that fit the requirements. What did he write?

Andrew sees a very rare bird named "Ruppell's vulture". Soon Andrew was dead. Can you explain the mystery, Mr. Sherlock?

I am white when I am dirty, and black when I am clean. What am I?

On my way to St. Ives I saw a man with 7 wives. Each wife had 7 sacks. Each sack had 7 cats. Each cat had 7 kittens. Kittens, cats, sacks, wives. How many were going to St. Ives?

You have an empty wine bottle with a cork that has been secured at the top in a normal way. There is a metal ring inside the bottle that is suspended by a string.

How can you make the metal ring drop to the bottom if you are not allowed to touch anything - not the bottle, not the cork, not the thread and not the ring?

Can you find the next number in the below sequence
3 , 7 , 10 , 11 , 12 , 17 ?

Always in you, Sometimes on you;

If I surround you, I can kill you.

What am I?

This is a classy optical illusion puzzle. What more you can find except bricks in the image below?

Make eight squares by moving only two matchsticks.
Note- Square can be of different sizes.

Complete the table series riddle by finding the number that can replace "??".