Monthly Archives: July 2011

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

Joe’s 100th MO question

Posted on July 12, 2011 by

MathOverflow is a remarkable recent platform for research level questions and answers in mathematics. Joe O’Rourke have asked over MO wonderful questions. (Here is a link to the questions) Many of those questions can be the starting point of a research … Continue reading →

Posted in Mathematics over the Internet, Open problems | Tagged , , | 5 Comments

A Couple Updates on the Advances-in-Combinatorics Updates

Posted on July 10, 2011 by

In a recent post I mentioned quite a few remarkable recent developments in combinatorics. Let me mention a couple more. Independent sets in regular graphs A challenging conjecture by Noga Alon and Jeff Kahn in graph theory was about the number of … Continue reading →

Posted in Combinatorics, Open problems, Updates | Tagged , | 4 Comments