Nice problems

If you like challanges see these problems on StackOverflow:

Rectangles:
http://stackoverflow.com/q/7706664/319875

Resequence items after a delete:

http://stackoverflow.com/q/10431305/319875

Get allways N rows per group, but distinct where posible

See below the question on stackoverflow and my solution.

http://stackoverflow.com/q/10396418/319875