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Author Archives: Alok Goyal
Solution to Puzzle #40: White-Tailed Cats
Two children sent me correct answers this time. Like last time, Shruti Mittal (from Mumbai) was the first one to send me a correct answer, and Danny Mittal (from Virginia, USA) also sent me a correct answer. Very well done! … Continue reading
Puzzle #40: White-Tailed Cats
This is another puzzle from the same book as I posted last time – “Professor Stewart’s Cabinet of Mathematical Curiosities”. This puzzle appears on Page #31 of the book. Here is the puzzle: ‘I see you have got a cat,’ … Continue reading
Solution to Puzzle #39: Triangle of Cards
I was very happy to see that many more people tried the puzzle this time compared to the last few weeks. The only correct answer I received though this time was from a new visitor – Shruti Mittal, 15 years … Continue reading
Puzzle #39: Triangle of Cards
I was gifted a new puzzle and math book by a friend today – Professor Stewart’s Cabinet of Mathematical Curiosities. This is a puzzle from this book, appearing on Page #6. Thanks Shalu for the book. I have 15 cards, … Continue reading
Solution to Puzzle #38: Famous Handshake Puzzle
I got only one correct answer for the puzzle, from Anku Jain – Well done and thanks! Anku’s answer was better explained than the source itself, and hence taking the liberty of reproducing his answer verbatim here. Assuming, no one … Continue reading
Puzzle #38: Famous Handshake Puzzle
This one is one of my favorites from the Martin Gardner collection: My wife and I recently attended a party at which there were four other married couples. Various handshakes took place. No one shook hands with himself or herself … Continue reading
Solution to Puzzle #37: Four 9’s and 100
I surprisingly got fewer answers than I expected. The most noteworthy response was from Ruchir Godura, who rattled a whole set of possibilities. I cannot prove that this is the exhaustive list, but here are the ones I have come … Continue reading
Puzzle #37: Four 9’s and 100
This one is a relatively easy one and something that can be attempted by folks of all age groups. I picked it up on the internet from the following site: http://www.puzzles2puzzleu.com/ You have four 9’s and you may use any of … Continue reading
Solution to Puzzle #36: Professor on the Escalator
This one turned out to be a little difficult for children who do not know algebra, and hence I did not get correct answer from any of the younger kids. Congratulations to Ruchir Godura and Varun Gupta for being the … Continue reading
Puzzle #36: Professor on the Escalator
This is a very tantalizing puzzle from one of the Martin Gardner books “More Mathematical Puzzles and Diversions” (Chapter 14, Puzzle #4). When Professor Stanislaw Slapenarski, the Polish mathematician, walked very slowly down the down-moving escalator, he reached the bottom after taking 50 steps. As … Continue reading
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