Thursday, 24 December 2009

A Christmas puzzle

The decorations of our Christmas tree form a triangle. What is the minimum number of red balls you can move in order to see the triangle upside down? Merry Christmas to everybody!

You need to move three. Look at the animation (by Leo)

Sunday, 20 December 2009

Merry Christmas

happy christmas

Postcard by Emanuela

Tuesday, 15 December 2009


Tuesday, 8 December 2009

Tuesday, 1 December 2009

Think differently!!! Nine dots problem

Draw nine dots on a paper and try to connect them with four straight lines without raising the pencil from the paper.

Solution - animation by Leo