Always in you, Sometimes on you;

If I surround you, I can kill you.

What am I?

Two friends were betting. One said to the other, "The coin will be flipped twenty times and each time the coin lands on the head, I will give you $2 and each time it lands on the tale, you will give me $3." After flipping the coin twenty times not a single penny was exchanged among them.

How many times did the coin land on heads?

What has six faces, but does not wear makeup, has twenty-one eyes, but cannot see? What is it?

All of the flowers I have are orchids except two. All of the flowers I have are hibiscuses except two. All of the flowers I have are roses except two.

Can you tell me how many flowers I have?

There is a unique number which when multiplied by any number from 1 to 6, we will get the new number that contains the same digits only.

Can you find that number?

What is both possible and impossible at the same time?

In the figure, you can see nine stars. What you have to do is connect all of them by using just four line and without lifting your hand i.e. in a continuous flow.

Can you think of any three-dimensional shape that comprises of exactly two surfaces?

In the given figure, move three matchsticks so that the resulting figure contains two rectangles.

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

When did John make this statement?