Monthly Archives: February 2017

Puzzle #172: Divisibility by first 13 numbers

I acquired a new book recently (thanks to Suman Saraf) – Problem Solving Strategies in Mathematics. Here is a problem from that book. It is a simple problem for adults, so will request people to show it to their children. … Continue reading

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Solution to Puzzle #170: Rectangle and the Oil Well

I got many correct answers, thanks to all who responded. This was a “simple” application of pythogoras theorem. I got correct answers from Abhinav Jain, Pratik Poddar, Karan, Praneeth Ruthala, Suman Saraf and Mahi Saraf. While everyone sent me only … Continue reading

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Puzzle #171: Buying Dimsums

This is a beauty of a puzzle sent by Suman Saraf – thanks Suman! A fast food restaurant sells dimsums in boxes of 7 and 3. What’s the greatest number of dimsums a person cannot buy. Generalize it for p … Continue reading

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Solution to Puzzle #169: Division of a Cake

This puzzle was not as easy as it looked…many people sent solution, but only Suman Saraf and his daughter Mahi sent the correct ones. To copy a line I really liked from Suman’s solution –┬áThe essence of fair or envy … Continue reading

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Puzzle #170: Rectangle and the Oil Well

This is a wonderful puzzle that I saw today after a long time. I was asked this puzzle in an interview in Microsoft back in 1994 March – yes it has been a long time! I saw it today in … Continue reading

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Solution to Puzzle #168: Who Gets the Easter Eggs?

This was a very counterintuitive puzzle, and a relatively difficult one, though one does not need to know any specific mathematical construct for it. Only two people (father – daughter pair) got the correct answer – Mahi and Suman Saraf! … Continue reading

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Puzzle #169: Division of a Cake

This is a very old puzzle. I remember this puzzle being asked by my Chemistry teacher in Class XI – Dr. Ravi Gopinath, someone was has had a strong influence in my passion for puzzles. I got reminded of this … Continue reading

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