A noted follower had requested a PDF file of questions/answers. Well, this is even better! The following link is of an e-book of Mathematics by Mr. M. P. Keshari.
PART 1 (Chp 1 to Chp 11): http://www.icseguess.com/ebooks/x/maths/part1/
PART 2 (Chp 12 to Chp 23): http://www.icseguess.com/ebooks/x/maths/part2/index.php
PART 3 (Chp 24 to Chp 29): http://www.icseguess.com/ebooks/x/maths/part3/index.php
It is thorough and even has examples of solved questions. Very useful! Do check it out! 🙂