Four rows of three circles in a line (1)           Jennie drew six circles on the fence and said to her teacher : - now we can see two rows of three-in-a-line. So what you have to do now is move one (and one only) of these circles in order to obtain four rows of three-in-a-line. Look at the circles very carefully before you start.     CLICK the picture                        (1)   Mathematical puzzles by Sam Loyd 1914