Category Archives: Riddles

In how many ways you can chose a committee of three students from a class of ten students?

Posted on July 19, 2011 by

The renewed interest in this old post, reminded me of a more recent event: Question: In how many ways you can chose a committee of three students from a class of ten students? My expected answer: which is 120. Alternative … Continue reading →

Posted in Mathematics to the rescue, Riddles, Teaching | 1 Comment

The Ultimate Riddle

Posted on February 2, 2010 by

 Click on the picture!

Posted in Riddles | Tagged | 15 Comments

The Mystery Beeping Riddle

Posted on March 3, 2009 by

    We came back from the airport with our daughter who has just landed after a four-month trip to India. The car was making a strange beep every so often. Maybe it is an indicator signal that should have … Continue reading →

Posted in Mathematics to the rescue, Rationality, Riddles | 12 Comments

Solution

Posted on January 18, 2009 by

The solution to the last riddle is:

Posted in Riddles | 4 Comments

A Riddle

Posted on January 15, 2009 by

 What is this?    

Posted in Riddles | 13 Comments

Greg’s Dinosaurs Riddle

Posted on November 7, 2008 by

The two-riddles post was a success, and while corresponding with Greg Kuperberg he had a riddle for me about dinosaurs, and he agreed I will share it with you. Right before the Chixculub asteroid hit the earth, there were a … Continue reading →

Posted in Riddles | Tagged , | 6 Comments

Two Math Riddles

Posted on October 23, 2008 by

Usually I am not particularly good at telling math riddles or solving them, and I was not planning on presenting math riddles here. But these days, when mathematical blogs break new ground and enter uncharted territories, let me make an exception and tell you … Continue reading →

Posted in Riddles | Tagged , | 17 Comments