Tag Archives: puzzle

The wonderful world of Mike Reilly

The other day I received an email from Mike Reilly, who introduced himself as a professional game and puzzle inventor, and suggested that I might be interested in taking a look at a few of his web sites. I wasn’t … Continue reading

Posted in games, links, people, puzzles | Tagged , , , , , | 2 Comments

My blog is back (hooray!) and a quick puzzle

My blog is finally back up after a long hiatus due to hosting problems (not the first time). I’m seriously contemplating moving somewhere more reliable, but it’s hard to come up with a solution that would not (a) invalidate any … Continue reading

Posted in logic, meta, puzzles | Tagged , , , | 8 Comments

The broken weight problem: solutions and further exploration

First of all, let me say to all my readers how fantastic it felt to post a puzzle, after not posting anything for two months, and get eighteen thoughtful, insightful comments in just three days; it’s every blogger’s dream. You … Continue reading

Posted in arithmetic, challenges, number theory, solutions | Tagged , , , , | 6 Comments

The broken weight problem

Here’s a fantastic problem I recently heard. Apparently it was first posed by Claude Gaspard Bachet de Méziriac in a book of arithmetic problems published in 1612, and can also be found in Heinrich Dorrie’s 100 Great Problems of Elementary … Continue reading

Posted in arithmetic, challenges, number theory, puzzles | Tagged , | 22 Comments

Math Teachers at Play #21

Math Teachers at Play #21 is up at Math Mama Writes…, and it includes this cute puzzle, which Sue apparently made up herself: The Numberland News runs personal ads. 21 was looking for a new friend and put an ad … Continue reading

Posted in fibonacci, links, number theory, puzzles | Tagged , , , , , , | 13 Comments

Who Am I?

An excellent puzzle from JD2718: There are five true and five false statements about the secret number. Each pair of statements contains one true and one false statement. Find the trues, find the falses, and find the number. 1a. I … Continue reading

Posted in challenges, logic, number theory, puzzles, teaching | Tagged , , | 13 Comments

One of these things is not like the others…

Hat tip to Tanya Khovanova.

Posted in pattern | Tagged , | 9 Comments