Error message

Warning: "continue" targeting switch is equivalent to "break". Did you mean to use "continue 2"? in require_once() (line 341 of /home/n9esbwprkar5/public_html/domains/circles/includes/

Pencil and paper

How many sheep can you place on a field, so that none can be attacked by the simple-minded wolf? What if there's more than one wolf?

02/28/2017 - 16:05

Every journey has its costs and its rewards. Can you complete this one without any debt?

02/28/2017 - 16:49

In how many ways can you draw a star using all the vertices of a polygon, without lifting your pencil from the paper? Are there some polygons for which it's not possible?

02/24/2017 - 17:53

Fold a long strip of paper in half several times. Can you see a pattern in the creases formed along the length of the paper? What sorts of route do we trace if we use the creases to direct our turns along a path?

02/28/2017 - 15:29