Make a square with 9 dots as shown. Cross all the dots with 4 straight lines without taking your pencil off the paper.
Puzzle provided by Kordemsky: The Moscow Puzzles (Dover)
Solution: The figure shows one solution.
If you would like to rate this lesson, then please register. Riuscipisci bla feummod olenim dignit irit luptatum zzriliquamet la commodigna facilit prat.