Webpage 1

We really like this site because as its  name says they are mathematical curiosities and are demonstrated through playful exercises and easy to understand. Maybe you can search in the internet and find other webpages like this, however the difference we found here is: The problems and the exercises that here are presented combine the history too, for example, please go to "the problem of the Königsberg bridges" and you are going to learn some of the Königsberg city

rt000z8y.eresmas.net/matemat.htm