Name a key which is hardest to turn.

If you paint a brown house white it will become a white house. If the stoplight changes from red to green, then the light is green. So, if you throw a white shirt into the Red Sea, what will it become?

2 ladies and 2 girls need to cross a river in a boat big enough for 1 LADY or 2 girls. How do they do it?

Can you count the number of triangles in the given picture?

There are 3 apples in the basket and you take away 2. How many apples do you have now?

There are three boxes on a table. One of the box contains Gold and the other two are empty. A printed message contains in each box. One of the message is true and the other two are lies.

The first box says "The Gold is not here".

The Second box says "The Gold is not here".

The Third box says "The Gold is in the Second box".

Which box has the Gold?

John said, "If yesterday was tomorrow, today would be Friday."

When did John make this statement?

How many runs at maximum can a batsman score in a normal one-day match? Consider the fact that the conditions are ideal and there are no No Balls, no Wide Balls and no Extras in that match.

Why is it against the law for a man living in Delhi to be buried in Mumbai?

Our product and our sum always give the same answer. Who are we?