How many sides does a circle have?

Tell me the Hindi name of a Vegetable which if we remove 1st word will become a precious Stone and by removing the last word it will become a sweet eatable.

One is to three as three is to five and five is to four and four is the magic number.
What is the pattern?

As you can see that fifteen matches have been used to form an arrangement. What you have to do is remove any six of them to make them ten.

Before reading ahead, you must know the fact that only one of the people here is telling the truth.

A says that B is lying.
B says that C is lying.
C says both A and B are lying.

Can you find out who is speaking the truth?

Can you make four (4) nines (9) equal 100?

John named his first son Alpha, second Beta, third Charlie and fourth Delta. What is the fifth son's name?

What building has the most stories?

A train full of passengers goes through a tunnel. When the train comes out from the other end, there is no single person on the train.

How did it happen?

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