Author Archives: Alok Goyal

Solution to Puzzle #90: The Three Gamblers

Posted on February 8, 2015 by Alok Goyal

Fabulous response for the puzzle…one of the best weeks since I started the puzzle blog two years back…thanks and keep puzzling. I got three correct answers (of course other than Vaibhav Kalia who had contributed the puzzle). The answer is … Continue reading →

Posted in Solution | Tagged , , | Leave a comment

Puzzle #90: The Three Gamblers

Posted on February 1, 2015 by Alok Goyal

Got this very nice puzzle from Vaibhav Kalia a while back, posting it on his behalf here. The three of us made some bets. First, Walter won from Martin as much as Walter had originally. Next, Martin won from Steve as much … Continue reading →

Posted in Puzzles | Tagged , | Leave a comment

Solution to Puzzle #89: Chameleons on an Island

Posted on February 1, 2015 by Alok Goyal

Thanks for trying this puzzle. I only got one correct answer  – from Gyora, and an “almost correct” and therefore a special mention, from Nandini, a 10 year old from Gurgaon. Well done Gyora and Nandini. I am taking the … Continue reading →

Posted in Solution | Tagged , | Leave a comment

Puzzle #89: Chameleons on an Island

Posted on January 26, 2015 by Alok Goyal

This is a very sweet puzzle I picked up from Gurmeet’s puzzles at http://gurmeet.net/puzzles/ (Thank you Gurmeet for such a wonderful collection of puzzles!). I tried this on a train ride with my two daughters, and my younger one (now 8 … Continue reading →

Posted in Puzzles | Tagged , | Leave a comment

Answer to Puzzle #88: Ken Ken Puzzles

Posted on January 26, 2015 by Alok Goyal

I got only a few answers to this puzzle, and all of them correct. In my opinion, the difficult one was pretty difficult – thanks to those who attempted it, and more so to those who sent a correct answer. … Continue reading →

Posted in Solution | Tagged , | Leave a comment

Puzzle #88: Ken Ken Puzzles

Posted on January 10, 2015 by Alok Goyal

Thanks to Alok Mittal for introducing me to Ken Ken puzzles through his Mathematical Circle classes – I spent a good chunk of my last week trying to solve the Ken Ken puzzles. Liked them so much, that I thought … Continue reading →

Posted in Puzzles | Tagged , | Leave a comment

Solution to Puzzle #87: The Magic Triangle (Challenge Puzzle!)

Posted on January 10, 2015 by Alok Goyal

A very happy new year to all readers and thank you for a wonderful response to the blog overall and this puzzle in specific. Last year people from exactly 100 different countries accessed these puzzles – thank you all! This … Continue reading →

Posted in Solution | Tagged , | Leave a comment

Puzzle #87: The Magic Triangle (Challenge Puzzle!)

Posted on December 31, 2014 by Alok Goyal

Hope you all had a great year and may 2015 be a less puzzling year than 2014! Ending the year with a difficult puzzle, to which I do not know the solution. This is a challenge puzzle, i.e., the first … Continue reading →

Posted in Puzzles | Tagged , | Leave a comment

Solution to Puzzle #86: Add The Digits and Count

Posted on December 31, 2014 by Alok Goyal

This was a difficult puzzle, and I got only one response and a correct one from Ganesh Ramani, my friend from IITD Comp Science and now in Tokyo – well done! To arrive at the solution, lets begin with Variation … Continue reading →

Posted in Solution | Tagged , , , | 1 Comment

Puzzle #86: Add The Digits And Count

Posted on December 13, 2014 by Alok Goyal

I found this beautiful puzzle on Brilliant.org very recently. A very different kind of puzzle, requires basic knowledge of combinatorics. I have also created a couple of simpler versions so that children can also attempt it. Original Problem: How many integers … Continue reading →

Posted in Puzzles | Tagged , , | Leave a comment