Monthly Archives: December 2014

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 →

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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 →

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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 →

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Solution to Puzzle #85: Colliding Ants

Posted on December 13, 2014 by Alok Goyal

This was a difficult puzzle overall, and only two people sent correct answers – Aman Singla and Girish Tutakne. I think in the end this was a bit difficult for children! I am reproducing the answer from Aman, Girish had … Continue reading →

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Puzzle #85: Colliding Ants

Posted on December 7, 2014 by Alok Goyal

Very nice puzzle from gurmeet.net/puzzles, which has a great set of puzzles on the site. I am taking a puzzle from this site after a long time. This puzzle should be interesting for children as well as adults. Peter and … Continue reading →

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Solution to Puzzle #84: Reason Without Equations

Posted on December 7, 2014 by Alok Goyal

Many people sent correct answers, which I had expected. However, very few sent the explanation behind the answers, which is what I was looking for. Some of you used equations to solve the question. Intent was to solve the questions … Continue reading →

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