What four weights can be used to balance from 1 to 30 pounds?

How can you leave a room with two legs and return with six legs?

What does it mean?

Three fair coins are tossed in the air and they land with heads up. Can you calculate the chances that when they are tossed again, two coins will again land with heads up?

What is black when you buy it, red when you use it, and gray when you throw it away?

I have nine bottles of wine and one of the nine bottles is poisoned.
I need to find the poisoned bottle with two facts
(1) Poison is deadly, only a sip will cost death
(2) I have two mice to do so.

How should I do it?

Can you identify if it's a murder or a suicide ?

An evil man kidnapped someone and made them take one of two pills. One was harmless, but the other was poisonous. Whichever pill the victim took, the kidnapper took the other one. The victim took their pill with water and died. The kidnapper survived. How did the kidnapper get the harmless pill?

Can you Find and name the hidden bird in the picture below ?

How can you write nineteen in a manner that if we take out one, it becomes twenty?