If all Goats are Sheep and all Sheep are Deers, are all Deers Goats ?

Name a key which is hardest to turn.

I have a five and a three-gallon jar. Assuming there is an infinite supply of water, how can I measure one-gallon water?

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?

What will you call your mother's brother's brother-in-law?

A man calls his dog from the opposite side of a river. The dog crosses the river without a bridge or a boat and manages to not get wet. How is this possible?

Rectify the following equality 101 - 102 = 1 by moving just one digit.

Rearrange the letters in "new door" to make one word.

What happened when the wheel was invented?

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