Hi Pehlaj,
 
This website may have what you're looking for: http://www.icseguess.com
 
You might also contact the Council for The Indian School Certificate Examinations (CISCE) directly to see what they recommend for practice worksheets: http://www.cisce.org/Login.jsp
 
Education.com offers high school level math activities you could review as well: http://www.education.com/activity/high-school/math/
 
I'm also including a link to the site's Test Preparation info center: http://www.education.com/topic/test-prep/
 
While these resources on Education.com are focused on the U.S. school system, you may find some insights that are beneficial to you as well. Good luck!