Can you calculate the probability of getting a sum of six when a dice is thrown twice?

It is always ahead of me yet I can never see it. What is it?

Always in you, Sometimes on you;

If I surround you, I can kill you.

What am I?

I never was there, I am always to be.
You have never ever seen me, not ever you will.
Yet I am the confidence of everyone.

Who Am I?

John buys rice at Rs.60/kg from Britain and then sells them at Rs.5/kg in India. As a result of this, he becomes a millionaire. How come?

Why is the Hole below a Lock?

Can you find a rabbit in the given picture?

A bus driver was heading down a street in Mexico. He went right past a stop sign without stopping, he turned left where there was a "no left turn" sign, and he went the wrong way on a one-way street. Then he went on the left side of the road past a cop car. Still - he didn't break any traffic laws. Why not?

Use only one mathematical symbol and all numbers (0-9) to get a sum of 99

An express train takes 3 seconds to enter the tunnel which is 1 km long.
If it is travelling at 120 km an hour, how long will it take to pass completely through the tunnel?