What goes up but never comes down?

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?

Name one eight-letter word with 'kst' in the middle, 'in' the beginning, 'and' at the end.?

Here is a mathematical expression that also secretly tells a movie name. What movie is that?

What kind of band never plays music?

In a jungle where there are no street lights or any other artificial source of lights, I notice a black snake crossing the road.
How did I get sight of the snake?

What 4-letter word can be written forward, backward or upside down, and can still be read from left to right?

This is a most unusual paragraph. How quickly can you find out what is so unusual about it? It looks so ordinary, you'd think nothing was wrong with it. Actually, nothing IS wrong with it. But it is not as ordinary as you might think. If you think about it for a bit, you will find out why it is truly so unusual. So what is it? What is so unordinary about this paragraph?

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

A man was driving a black truck. His lights were not on. The moon was not out. A lady was crossing the street. How did the man see her?