I am a type of room you cannot enter or leave. Raised from the ground below, I could be poisonous or a delicious treat. What am I?

If "P" means "-", "Q" means "/", "R" means "+", and "S" means "*" then find the value of the following:

21 Q 7 R 9 S 10 P 13

Jenifer is learning to drive her car. She went down a one way lane and in the wrong direction. But she do not break any law.

How come ?

If a shopkeeper can only place the weights on one side of the common balance. For example, if he has weights 1 and 3 then he can measure 1, 3 and 4 only. Now the question is how many minimum weights and names of the weights you will need to measure all weights from 1 to 1000? This is a fairly simple problem and very easy to prove also.

I can be cracked, made, told, and played. What am I?

Why is 6 afraid of 7?

Can you find out a way through which you can make five squares out of the given figure by moving just six match sticks?

I have lakes with no water, mountains with no stone and cities with no buildings. What am I?

You can see it everyday, But cannot touch it at will. What is it?

What is the fastest way to double your money?