Recent Comments
Senthil Kumar VS on Solution to Puzzle #200: Achie… Alok Goyal on Puzzle #200: Achieve your… Vishal Poddar on Puzzle #200: Achieve your… Alok Goyal on Puzzle #200: Achieve your… Abdul on Puzzle #200: Achieve your…
Monthly Archives: June 2017
Puzzle #186: 4×4 Grid
This is another wonderful puzzle from A Moscow Math Circle, Week by week problem Sets by Sergey Dorichenko. There are two parts to the problem: (a) Place seven stars in a 4×4 grid so that, no matter which two rows … Continue reading
Solution to Puzzle #184: The Sage and the Pharmacist
This was a different kind of puzzle, and I was happy to see the response. I got correct answers from Mahi Saraf, Sahaj Sharma (my nephew from Jaipur) and Pratik Poddar – well done all. Thanks again to Alok Mittal … Continue reading
Puzzle #185: Marker on a 9×9 Board
This is a wonderful puzzle, this time from a relatively lesser used source – A Moscow Math Circle, Week by week Problem Sets, by Sergey Dorichenko. One marker is placed in the center of a 9×9 board. Anisha and Arushi … Continue reading
Solution to Puzzle #183: 8 Digits
This was a relatively simple problem. I was happy to see my 10 year old, Arushi, solve this one. I also got correct answers from Karan Sharma, Mahi Saraf, Anahat Prakash, Pooja Goyal, Pratik Poddar and Suman Saraf. Well done … Continue reading
Puzzle #184: The Sage and the Pharmacist
This is a beautiful riddle that I am borrowing from Alok Mittal’s Mathematical Circles class. In a far away land, it was known that if you drank poison, the only way to save yourself is to drink a stronger poison, … Continue reading
Solution to Puzzle #182: Weights and Balance Once More
This was a difficult puzzle. I got two correct answers – From Suman Saraf and Anahat (Prakhar’s son). Well done, or rather – excellent! Here is the solution for 5 weights – copying solution from Suman. let’s say the weights … Continue reading
Puzzle #183: 8 Digits
This is another 2-minute problem that kids will enjoy. Found this one again in Martin Gardner’s The Colossal Book of Short Puzzles and Problems. Look at the figure below, which has 8 empty circles. You need to place digits 1 … Continue reading
Solution to Puzzle #181: Hidden Cross
This was a simple puzzle, but I did not get as many solutions as I would have expected. Both Suman Saraf and Pratik Poddar sent the right answers, along with three people at home – Karan Sharma (my nephew) and … Continue reading
Alok Goyal's Puzzles Page 