Why is it very easy to weigh a fish?

A man hijacks an aeroplane transporting both passengers(8 of them) and valuable cargo. After taking the cargo, the man demands nine parachutes, puts one of them on, and jumps, leaving the other eight behind. Why did he want eight?

What can go through glass without breaking it?

In the picture given below, can you find out which digit will take place of the question mark?

Teacher ask the student

'Why are you standing on that chair in music class ?'.

what did student replied ?

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

You are playing as white and given four rooks to checkmate the black king in four moves with the following rules 1. You can place one rook every move and ensure the black king should be in check position.2. After four moves the black king should be in the checkmate position.

I have a mouth but I don't eat.
I have a bank but have no money.
I have a bed but i dont sleep.
I wave but have no hands.

Who Am I ?

Given that

(78)^9 = 6
And (69)^4 = 11

Can you find out

(99)^2 =?

(Note: This is Logical, not Mathematical)

Which alphabet is a part of our body?