![]() For n 4, I'm seeing that you need at least 6 lines, since the restriction that no two lines can be parallel makes things tough. Solution: A similar problem is present here Connect 9 dots using 4 lines. Pin On Activity For Kid We hope that your kid lo SeptemAdd Comment Edit. Draw 3 straight lines without removing pen from paper such that each of the 9 circles is in contact with at least one line. What causes black tiny lines or dots on nails. The solution, shown on the right, should be easy but is very hard in practice. From there, any other line drawn can only cover n-2 new points, so in total with n+1 lines you can't cover more than n 2 - n + 3 points, after n 3 we see that n+1 lines is not enough. Consider 9 circles each arranged at the center of cells of a 2-D matrix of shape 33. Move pen to center dot and then left and right to make third line ,return to center dot. that nine dots arranged in a square be connected by four straight lines drawn. If you know the answer, say that you know it and PM me. Training for Insight : The Case of the Nine - Dot Problem Trina C. Without lifting your pen, draw four lines that cross all 9 dots. Notice that there was no restriction to moving pen back to retrace. 1 You have 9 dots arranged like a rectangle. On the left are shown nine dots to be connected by four straight lines, without lifting the pen from the paper and without retracing any lines. Move your pen back to center dot on same line. Your challenge is to draw four straight lines which go through the middle of all of the dots without taking the pencil off the paper. It was first discussed by the US psychologist Norman R(aymond) F(rederick) Maier (1900–1977) in an article in the Journal of Comparative Psychology in 1930. It is often used to illustrate lateral thinking and is a perfect example of ‘thinking outside the box’. Fewer than 5 per cent of undergraduate students manage to solve it in two minutes, and most are convinced by then that no solution exists. 9 dots 4 lines 9 dots 1 line This tricky puzzle & the awesome riddle has three genius solutions GOLDY KUMAR 76 subscribers Subscribe 54 Share 15K views 4 years ago 9 dots and 4. ![]() If symmetric solutions are considered equivalent, then it is a well-defined problem, and it should be easy, because there are only a few possibilities to try, but it is difficult in practice for psychological reasons. ![]() A reasoning problem in which the task is to connect nine dots, arranged in a square, by four straight lines drawn without lifting the pen from the paper and without retracing any lines (see illustration).
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