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9 dots 4 lines8/5/2023 ![]() Maybe some of you have already known the answer. This is one of the brain teasers I love very much. Hello everyone This brain teaser above is quite old but it can effectively help people begin to think creatively. I haven’t been able to emulate this solution however the required folds can be viewed here. Challenge: Please connect all 9 dots on the page by drawing 4 straight lines without lifting your pen/pencil from the page. So theoretically you could solve this with three lines. Also, if you draw out to infitity, the angle with all other points becomes zero. If you know the answer, say that you know it and PM me. Below is a photo I took of this solution:Ī second one line solution involves origami and a specific placement and size of the dots on the page. Some of you may be familliar with it but for others who are not, this is a puzzle where there are 9 dots that you have to join together with 4 straight lines (. Without lifting your pen, draw four lines that cross all 9 dots. Participants are presented with a set of dots arranged in a 3x3 grid and challenged to connect all nine dots, without lifting their pencil from the paper, using the fewest possible number of straight lines. The paper is then folded and a straight line is drawn connecting the dots. The task was to connect all 9 dots using 4 straight lines without ever picking up the pencil or retracing any of the lines. The nine dot problem is a classic lateral thinking exercise that gained widespread popularity in the 1970s and 80s. The method I came up with when trying to solve this puzzle involved tearing the paper, not so much that any piece comes loose. There are several one line solutions to this puzzle. The three-line solution can be viewed below: Here are some other ways you could have solved the Join the. There is always more than one right answer to many problems. Your task is to join all nine dots using only four (or less) straight lines, without lifting your pencil from the paper and without retracing the lines. There are rotations, reflections and variants to this solution: Imagine the pattern of dots below drawn on a sheet of paper. ![]() The one line solution requires that the paper be folded. Scroll down for a clue and further down for the answer.Ĭlue: The lines drawn are permitted to leave the area of the dots and continue on into the blank portion of the page in order to gain a better angle for subsequent lines. ![]() Printing the dots out or drawing them on paper is required for this solution. Rather than using 4 lines, can you solve it with 3 straight continuous lines?įinally, for anyone brave (or foolish enough) there is a more challenging further question that requires just 1 straight line to connect the 9 dots. Can you connect all nine dots by drawing four straight lines without lifting your pencil Suggestion for illustrating the Think Outside the Box conundrum. There is a more challenging version of this puzzle. The task commonly posed is to draw 4 straight lines without taking your pen off the paper so that all 9 dots are joined. This well-known problem entails 9 dots as seen below. ![]()
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