Hi jskushawah
Chandoo.org itself a great place to learn and practice excel.Till date, Chandoo has written "n" number awesome articles on so many different topics and share the data file with his great trickssolution.
However, for your reference, you can have a look at the following sites:
http://fccweb.pbworks.com/w/file/fetch/48947474/CS100.F2011.A1.pdf
http://www.wiziq.com/tests/ms-excel
Do google, you will get lot of such sites.
However, I would request you to deep dive into chandoo.org and you will understand why I am saying so...
Regards,
Kaushik