Day: January 10, 2000

One day a school teacher wrote on the board the following: 9×1=79×2=189×3=279×4=369×5=459×6=549×7=639×8=729×9=819×10=90When she was done, she looked to the students and they were all laughing at her, because of the first equation which was wrong, and then the teacher said the following,“I wrote that first one wrong on purpose, because…