From "The man who counted"

Do you know this book? This is one of the puzzles

Irritating games

These days we are so busy with our Medialab project. We are trying to construct one small Fermat room and we realized how difficult it is. When we feel frustrated we try to relax with these games. Have a nice weekend...

The book

Delia and Janina have several 1 € value coins each and they want to buy a book. Delia needs 3 € more to buy it, while Janina needs 5 € more. They decide to buy the book together and share it, but they realize that they can´t. ¿How much is the book? (the price is an exact number of euros)

Tantrix

It´s a really complex game. There exists a world tournament.
You can visit the web site directly and play online.
I recommend you first to know puzzles rules and practice it
Have a nice weekend!

Bricks

Don´t forget to ask the cat for checking the solution. Click here

How Many Times

How many times can surround the Earth at Equator a lace made of molecules from 1(one) miligrame of water?

And because it is the first of the month March I wish for all a beauty spring.

Horse Jumping

A chess horse wants to jump all the squares of this 5x5 board without stepping more than one time each. Would you help him?
Would you do it in a regular 8x8 chessboard?
You can try more boards and send your solutions like a comment...