Mathematical Excalibur from Hong Kong

Mathematical Excalibur is a mathematic magazine that publish after The 35th International Mathematical Olympiad was held in Hong Kong. This magazine was written in English and Traditional Chinese by Hong Kong University of Science and Technology, Department of Mathematics.
Anyway you can receive material for new issue, just create your individual subscription to author of this magazine. You can download it here: http://www.math.ust.hk/excalibur/

Dear all members here!

Dear all member here! I'm Piseth, the last senior member of CMG. I'm really pleased that Xiao Wei invite me to contribute with CMG. Hrm... my English is not good so I can't write too much. I have something want to ask. CMG has a Khmer blog, right? Why we don't update it?

B3, Clue

I have tried to solve the problem B3. I haven't completed the solution yet. But i hope my clue woule be useful for e.one to try.  

Here is what i observe : 

thanks

Time to be active, A1&&B1 brief solution

Sorry don't have time to type. I will try to solve some more when get some time. Just to encourage e.one to solve it together. Thanks :)

Harvard Math Competition: Test Your Math Skill

Hi All,

You may want to test your math skills. Below is a math competition at Harvard University.

To read and try to solve last December's competition, go here

For more information about the competition, go here

I would be happy to see your solutions. Show and prove your skill as a new generation of the Khmer Empire!