What is in seasons, seconds, centuries and minutes but not in decades, years or days?

What can you see in the middle of March and April that you can never see in any other month?

You need to remove two matchsticks to make the below equation true. Can you do it ?

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?

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 anyone tell me a word in the English dictionary which has a silent 'z'?

The square root of number 121 is "11". What is the square root of the number "12345678987654321."?

You can hear me, but you can't touch or see me.

What am I?

With the help clues provided in the image, can you find the 5 digit key?

Two fathers and two sons went fishing one day. They were there the whole day and only caught 3 fish. One father said, that is enough for all of us, we will have one each. How can this be possible?