Thanks to the 342 participants.

Thanks to Madhav Sankaranarayanan for some innovative puzzles in this round!

Those who missed taking part in this test can still take this test unofficially.

I am not a Math student so did not expect to solve any variant especially since it was authored by a young Math whiz. I am glad I managed to solve both the Mathrax and the 6by6 equation :). I wasted a lot of time on the 9by9 equation sudoku but kept breaking. The classics were very good. I look forward to solving the other variants at leisure.