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Author Archives: Alok Goyal
Puzzle #116: The Magic Card Frame
Yet another wonderful numbers puzzle from Alok Mittal’s Mathematical Circles class. Not too difficult, and yet a lot of fun! Take 10 cards of the same suite from Ace (A) through 10, i.e. essentially numbers 1-10. Using each card exactly … Continue reading
Solution to Puzzle #114: 1978
This was a relatively simple puzzle and the number of people who sent correct answers was overwhelming. I will try to capture as many as I can – Ishir Gupta (only one not to use algebra), Pratik Poddar, Suman Saraf, … Continue reading
Puzzle #115: The First Rabbit
This is a puzzle I got recently from my daughter, Anisha, who in turn got this puzzle from Alok Mittal’s Mathematical Circles Class. There is an island on which a rabbit arrives. Rabbit reproduces, as part of which it gives … Continue reading
Solution to Puzzle #113: Magic Arrangement of Cards
I got an overwhelming response to this puzzle – so many that putting down the names of correct answers is not feasible. This was also the best viewership of the blog for any week since I started this blog – … Continue reading
Puzzle #114: 1978
This is a puzzle for the number buffs that I found on http://www.mindcipher.com The year 1978 is such that the sum of the first two digits and the latter two digits is equal to the middle two digits, i.e. 19 … Continue reading
Solution to Puzzle #112: Weights and Balance Revisited
As I mentioned in the question, this is an age old problem, but I was still intrigued by the twist provided to this puzzle by a colleague’s daughter. Many people gave a correct answer to the first two parts of … Continue reading
Puzzle #113: Magic Arrangement of Cards
This is a puzzle I have known for a very long time, and do not remember who asked me, I probably did it when I must have been around 15 years old. I loved this puzzle of cards. Unlike other … Continue reading
Solution to Puzzle #111: Soldiers In a Line
This was a difficult puzzle. I had trouble understanding the answer even when it was given to me, and had to go to Alok Mittal for rescue. Siddharth Goel (Founder, Adstrak) gave some useful links for this puzzle and Sumar … Continue reading
Puzzle #112: Weights and Balance Revisited
This is a twist to a puzzle which has been around for a very long time. I have myself looked at this puzzle since I was a kid, but a twist (or a potential flaw) to the puzzle was recently pointed … Continue reading
Solution to Puzzle #110: Circular Dining Table
This was a relatively easy puzzle and many people sent a correct answer. That included Siddhartha Goel, Suman Saraf, Pratik Poddar, Traveling Salesman (which I believe is a nick name), Narsimha Pai and Salil Panikkaveettil. The puzzle used a popular … Continue reading
Alok Goyal's Puzzles Page 