How can you write nineteen in a manner that if we take out one, it becomes twenty?

What is both possible and impossible at the same time?

A boy collects white seashells from the sea and brings them home every night. When he has enough of them, he decides to sell them to a trader.

The trader is ready to buy the shells and he asks the boy about the quantity. At this, the boy starts calculating. He has a giant box that contains 3 mini boxes. Two of them have another mini box inside. If the giant box can hold 50 shells, how many brown shells can he sell to the trader?

My location can be determined by the below rebus.
So where am i ?

I am not a bull but I have horns.
I am not an ass but I have a pack saddle.
Wherever I go, I leave silver behind me.

Who am I?

Spot 5 differences in two Christmas tree below:

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

In two decks of cards, what is the least amount of cards you must take to be *guaranteed* at least one four-of-a-kind?

The peacock is a bird that does not lay eggs. How do they get baby peacocks?

He does not have any heart but still, He manages to live.
If you kill him, you will eventually die but yet you kill him.
He cannot run, who is He?