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試試中文(Try Chinese)  试试简体中文(Simplified Chinese) Quiz for Today (10/8/2015)

Puzzle NumberPuzzle NameUpdate Date
Math123 The Five-Pointed Star10/1/2015
Math087 Learn and Practice10/1/2015
Logic016 Who stole the jewelry?10/1/2015
Logic012 What is the color of my horse?10/1/2015
Geom029 Area of the circle10/1/2015
Geom020 How big is the shaded area EFGH?10/1/2015
During the past 8 months this website has been hacked so many times. Because of this the website was down and up and we could not provide satisfactory services. We apologize for the inconvenience.

In order to avoid those damages from the attacks in the future, we reconstructed this website with new technology and SSL. All the old members have to reset their password to protect their accounts and our website. The strong password is required and we will encrypt the password.

For the new website, we are introducing another language – Chinese 中文. Later on we will implement the Spanish version.
We know that we still have a lot of defects on our website because we are forced to rush into production. If you have any login or membership problem please do not hesitate to write us at

Thank you for your support.