There are forty elephants and they have forty-fore heads. How can this be possible?

Why do we preferably have round manhole covers and not square ones?

What is the next number in this series?

4,12,84,3612....

In two decks of cards, what is the least amount of cards you must take to be *guaranteed* at least one four-of-a-kind?

To tease, King Akbar told his most clever advisor Birbal to give his daughter one thing that she can eat when hungry, drink if she feels thirsty and can burn if she feels cold. King Akbar was shocked when Birbal gave Akbar's daughter one such thing that satisfies all of the above.

What did Birbal give to Akbar's daughter?

What goes through cities and fields, but never moves?

A famous swimmer can swim downstream in a lake in exactly 40 minutes with the lake current.
He can swim upstream in that lake in exactly 60 minutes against the lake current.
The length of the lake is 2 km.

How long he can cover the distance of one side at a still lake with no current?

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

What begins with T, ends with T, and has T in it?

It is a six-letter word.
The first four letters are me.
The second and last letters are the same.
The fourth second and last letter is payment.

Who is it?