Why Wine Glass Stem is so long?

I know a ten-letter word in the English language which can be typed using only the top rows of the computer keyboard.

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

How is this possible?

You have two strings whose only known property is that when you light one end of either string it takes exactly one hour to burn. The rate at which the strings will burn is completely random and each string is different.

How do you measure 45 minutes?

A man says, "Brothers and sisters, have I none, but that man's father is my father's son." Who is that man?

When I get multiplied by any number, the sum of the figures in the product is always me. What am I?

After undergoing a successful eye operation, A blind girl has just boarded a train to her home. The doctor asked her to open the bandages after 3 hours. On her train journey, she opened the bandages and within a fraction of the time she commits suicide by jumping off the train.

Though her operation was successful, Why did she commit suicide?

A high school has a strange principal. On the first day, he has his students perform an odd opening day ceremony:

There are one thousand lockers and one thousand students in the school. The principal asks the first student to go to every locker and open it. Then he has the second student go to every second locker and close it. The third goes to every third locker and, if it is closed, he opens it, and if it is open, he closes it. The fourth student does this to every fourth locker, and so on. After the process is completed with the thousandth student, how many lockers are open?

There is something which is always coming but never arrives?

What kind of tree can you carry in your hand?