What mathematical symbol can be put between 5 and 9, to get a number bigger than 5 and smaller than 9?

No one wants to have it, but if one got it, he does not want to lose it. What is It?

How can you take 2 from 5 and leave 4?

I am white when I am dirty, and black when I am clean. What am I?

Identify the movie name through below Rebus containing Pi Mouse and coconut tree..

A bomb exploded in a room full of married couples and no one died. How?

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 ?

It can't be seen, can't be felt, can't be heard, and can't be smelt.
It lies behind stars and under hills, And empty holes it fills.
It comes first and follows after, Ends life, and kills laughter.
What is it?

Irene killed hundreds of people mercilessly and yet the police were not able to put her behind the bars. Why?

What are the next two letters in the following series and why?
W A T N T L I T F S _ _

*Hint: Check Puzzle Title