Can you replace the question mark with the correct number?

I know a ten-letter word in the English language which can be typed using only the top rows of the computer keyboard.

John went to buy some expensive, foreign chocolates. He only had Rs 100 with him. When he reached the shop, he got out and know that on those chocolates, there was a 15% import duty and 5% VAT.

How much worth chocolate should he buy so that he can accommodate it in Rs 100?

If your uncle’s sister is not your aunt, what relation is she to you?

Find the number of squares in the below picture

It is an eleven letter word.
The first, second, third and fourth letters form a banquet's name.
The fifth, sixth and seventh letters form a car's name.
The eighth, ninth, tenth and eleventh letters form a mode of transport.

Can you identify what word it is?

What is the word or phrase?

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

A man is found unconscious in front of a store at two in the morning. His head is bleeding and there’s a brick laying next to him. When the police arrive, they carry the man to jail. Why did they arrest him?

Imagine you are in a room with no windows or doors. How will you get out?