Monthly Archives: September 2017

Puzzle #196: Bugs on a Board

Yet another very fine puzzle from A Moscow Math Circle: Week by Week Problems by Sergey Dorichenko. Each square of a 9 x 9 board has a bug sitting on it. On a signal, each bug crawls onto one of … Continue reading

Posted in Puzzles | Tagged , , | 1 Comment

Solution to Puzzle #194: Adjacent Cells on a Chessboard

I got only two correct answers for this puzzle – from Suman Saraf and Pratik Poddar – thank you both and well done! I am taking the liberty of copying the answer from Pratik – I find it to be … Continue reading

Posted in Solution | Tagged , | Leave a comment

Puzzle #195: 1989!

This is a beautiful puzzle from Mathematical Circles (Russian Experience) by Dmitri Fomin, Sergey Genkin and Ilia Itenberg. There numbers 1, 2, 3, ….. , 1989 are written on a blackboard. It is permitted to erase any two of them … Continue reading

Posted in Puzzles | Tagged , , , | 3 Comments

Solution to Puzzle #193: Smallville Telephones

This was a simple puzzle, and I got correct answers from many. These include Vishal Poddar, Pratik Poddar, Suman Saraf, Mahi Saraf and Anand Singhi. Well done all. The answer is “Not Possible”. This is a simple application of graph … Continue reading

Posted in Solution | Tagged , | Leave a comment

Puzzle #194: Adjacent Cells On a Chessboard

This is another beauty of a puzzle from A Moscow Math Circle: Week by Week Problems by Sergey Dorichenko. The numbers from 1 to 64 have been placed in each square on a chessboard such that each number appears exactly … Continue reading

Posted in Puzzles | Tagged , , | 1 Comment

Solution to Puzzle #192: Too Many 6’s

This was a difficult manipulation of numbers, and I received 4 answers from Mahi Saraf, Anand Singhi, Pratik Poddar and Prakhar Prakash. Only two of these I found to be completely correct – from Mahi Saraf and Anad Singhi. That … Continue reading

Posted in Solution | Tagged , | 1 Comment