How do you go from 98 to 720 using just one letter?

I add 5 to 9 and get 2. The answer is correct, so what am I?

There was an aeroplane crash, every single person died, but two people survived. How is this possible?

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?

Give it food and it will live; give it water and it will die.

Why do you find that most of the buildings are deprived of the 13th floor?

Can you find out who is the kidnapper in below Picture and why, Explain ?

A spaceship was lost. The detective was given a piece of paper. This was the location of the spaceship! This is what the slip had scribbled on it:
Juice, Umbrella, Potato, Ice, Tomato, Elephant, Rice.

Where is the spaceship?

James bond was pushed out of an aeroplane without any parachute.
He survived, How come?

What does an Island and the letter T have in common?