A well known riddle shows something of the way problem solving works and something of the way to navigate this course.

You are asked to connect all nine dots, in a square array, with four straight lines without lifting your pen from the paper nor crossing the lines more than once.

The problem appears to have no solution, but of course we know it does. If for example, you draw a sequence of lines on three sides, then the fourth line would be either a diagonal that connects the center dot ( and crosses more than one line), or a horizontal line that connects the lower dot. You cannot get them both.

The trick of course is to walk around the accepted limitations. Think outside the box. If you can do it, send me your solution.