If you remove one from eleven, it becomes ten. If you remove one from nine, it becomes ten.

How is this possible?

Two boys were admitted to a school. When the headmaster asks them about their parents, they tell him that they have same parents (father and mother). On further inquiry, it turns out that they both share the same date for their birthday.

"Are you twins," ask the headmaster.
"No," replies the boys.

Is it possible?

Six glasses are in a row. The first three are filled with milk and the last three are empty. By moving only one glass, can you arrange them so that the full and the empty glasses alternate?

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

The answer I give is yes, but what I mean is no. What was the question?

I have a hole in my back and legs I lack.
I live where I can’t breathe and I eat without teeth.
What am I?

In a boat, the father of a sailor's son is sitting with the son of the sailor. However, the sailor is not present on the boat.

Can this even be possible?

The doctor advised his patient to take a tablet after every fifteen minutes. He gave him five tablets in total.

How much time will he take to have all the five tablets?

What does the following represent?

N N N N N N N

A A A A A A A

C C C C C C C

How can you leave a room with two legs and return with six legs?