Find the value of "?" in the ball picture Riddle below:

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.

There’s a girl who has a large family. She has an equal amount of brothers and sisters, but each brother only has half as many brothers and sisters. What’s the correct amount of brothers and sisters?

Astrology starts with the alphabet A, Biology starts with B, Psychology with P and Limnology with L.

Can you find an "ology" that begins with a P?

The day after tomorrow will be three days before Tuesday. Can you find out what is today?

What four weights can be used to balance from 1 to 30 pounds?

I was born in a small house and I live in it all alone. No windows and no doors have been assigned to my house. The only way I can go out is by breaking through the walls of my house.

Who am I?

Can you make four (4) nines (9) equal 100?

how come the second man dies?

What's the next in the series?

H, Be, F, S, Mn, Kr, In, Gd, Tl, ?