What goes up but never comes down?

Rahul decided to meet Simran so he boards a local train from Bombay station. Just after the station, there is a 1km long tunnel. The train starts and is now accelerating. Rahul is a claustrophobic guy, so what is the best position for him to sit?

I am written with two letters.
I said with the one.
I usually am seen with the two.

Who am I?

When can we add 2 to 11 and get 1 as the correct answer?

If I put in one canary per cage, I have one bird too many. If I put in two canaries per cage, I have one cage too many. How many cages and canaries do I have?

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

For an extra income, John decided to work at a Hotel for one hour daily. The manager offers him that they will pay him $11 after every 11 days.
However, John offered a different proposition to the manager. The offers stand as:
He will be paid just a penny on his first day.
Two pence will be paid on the second day,
Four pence will be paid on the third day.
And so on till the 11th day.

Should the Hotel manager accept his offer?

What number do you get when you multiply all of the numbers on a telephone's number pad?

Replace the letters of words with a number so that the below equation holds true

BASE +
BALL
---------
GAMES
----------

A man says, "Brothers and sisters, have I none, but that man's father is my father's son." Who is that man?