In which direction should the missing arrow point?

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.

If we tell you that there is a relation between the numbers and letters in the given figure, can you analyze it and find the missing letter in the last box?

A word I know has six letters it contains, remove one letter and 12 remain. What is it?

What work can one never finish?

How many times in a given day, minutes and hour clock comes in a straight line ?

Why do you find that most of the buildings are deprived of the 13th floor?

What does this rebus puzzle means ?

What can you hold in your right hand, but never in your left hand?

Solve this riddle by finding the odd one out from the rest.