How can a man go eight days without sleep?

I have Rs.50 and I spend it in the way as below.

I am 5 letters long.
My first two tell you who I am
My first 3 could be a medicine
My last three reversed could be a young boy.
My 4th, 3rd and 2nd in that order could be a fruit drink.
If you have me you may hang me round your neck
WHAT AM I ?

John is on an island and there are three crates of fruit that have washed up in front of him. One crate contains only apples. One crate contains only oranges. The other crate contains both apples and oranges.

Each crate is labelled. One reads 'apples', one reads 'oranges', and one reads 'apples and oranges'. He know that NONE of the crates have been labeled correctly - they are all wrong.

If he can only take out and look at just one of the pieces of fruit from just one of the crates, how can he label all of the crates correctly?

What word is pronounced the same if you take away four of its five letters?

What jumps when it walks and sits when it stands?

It is always ahead of me yet I can never see it. What is it?

Below rebus represent famous DiCaprio movie. Can you name it?

I know a nine-letter word having only one vowel.
Do you ?

Why did the Girl throw the butter out of the window?