There are 20 people in an empty, square room. Each person has full sight of the entire room and everyone in it without turning his head or body, or moving in any way (other than the eyes). Where can you place an apple so that all but one person can see it?

Find the last number in the series below:

voN luJ yaM raM ---

I have no doors but I have keys, I have no rooms but I have space, you can enter but you can’t leave! What am I?

I am looking for a word that change both gender and number when i add the letter 'S'.

What Word am I Looking For ?

A number can be multiplied by multiple of nine
i.e 9 18 27 36 45 ...

and the resulting number consist of only one digit.

Can you identify the number ?

Name a key which is hardest to turn.

Why is the Hole below a Lock?

You board a train. The train will have to enter a tunnel soon. You are claustrophobic. Which place is the best for you to sit?

How can you make a TV, a bed, a dog, and a car liquid?

What is the fastest way to double your money?