Brainteaser DIRECTIONS: WITHOUT taking your pencil off the paper, draw 4 straight lines through each dot! You can only go through each dot ONCE! Remember that each line has to be a straight line, and you can only draw 4 lines! Draw more boards if you need to! Includes Answer Sheet I've used this with my 3rd graders and about 5 out of 20 can get the answer. This brainteaser can be used for ages 8 and up!