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

A bomb goes off.
Carnage.
One person, only a few feet away, survives! How can this be?

There is a straight highway. Four different villages lie on that highway. The distance between them is different. The third village is 60km away from the first village; the fourth is 40 km away from the second; the third is 10 km near to the fourth that it is to the second.

Can you calculate the distance between the fourth and the first village ?

I know there are two methods by using three time the same number with a plus(+) operator , you can make sum as 60.

One of them is 20+20+20.

whats the other way ?

A finger goes in me. You fiddle with me when you're bored. The best man always has me first. What am I?

It comprises roots which nobody sees,
Much taller than those trees,
Up and up it goes,
Still it never grows?

What does this say?

XLR8

You need to arrange three 7 and mathematical symbols to form number 1?

There are 2 people near the river and both of them want to get on the other side. The boat can only take one of them. But they got across.
How?

You are trapped in a room with two doors. One leads to certain death and the other leads to freedom. You don't know which is which.
There are two robots guarding the doors. They will let you choose one door but upon doing so you must go through it.
You can, however, ask one robot one question. The problem is one robot always tells the truth, the other always lies and you don't know which is which.
What is the question you ask?