Nice Puzzles Madhav. Very logical puzzles. Classic Puzzles were very enjoyable. Looking forward to seeing more contests by you.

Thank you everyone for your kind comments! Had a lot of fun setting some of these variants.

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.