Check sum numbers and open screen

Hello my friends,

Today I have problem with my appliacation. 

I would like to create quiz, with replay as "numbers".

Structure:

If you have numbers amount: 1-6 ---> open screen A

If you have numbers amount: 7-9 ---> open screen B

If you have numbers amount: 10-15 ---> open screen C

If you have numbers amount: 16-21 ---> open screen D

If you have numbers amount: 22-25 ---> open screen E

Any ideas?

resolved:

http://amerkashi.wordpress.com/page/3/