What has no start, end, or centre?

In the formation, you can see a few arranged matchsticks. Can you form three squares by moving just three matchsticks?

Move four matchsticks to the below square to form three squares?

Forwards I am heavy, backward I am not. What am I?

If you were to put a coin into an empty bottle and then insert a cork into the neck, how could you remove the coin without taking out the cork or breaking the bottle?

A girl has as many brothers as sisters, but each brother has only half as many brothers as sisters. How many brothers and sisters are there in the family?

Rob is taller than Edwin, and Jurgen is shorter than Rob.
Of only one of the following statements, we now certainly know it is correct:

A.Edwin is taller than Jurgen
B.Jurgen is taller than Edwin
C.It cannot be determined if Jurgen or Edwin is the tallest.

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

In The Image Below Which clock is the odd one out?

A new Engineering building containing 100 offices had just been completed. John was hired to paint the numbers 1 to 100 on the doors. How many times will John have to paint the number nine (9)?