Can You Connect 9 Dots With 4 Continuous Lines?

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    Dot Puzzle
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Discussion Overview

The discussion revolves around a classic puzzle involving connecting 9 dots arranged in a 3x3 grid using no more than 4 continuous straight lines. Participants explore the challenge of the puzzle and clarify the rules regarding the continuity of the lines drawn.

Discussion Character

  • Exploratory, Conceptual clarification, Debate/contested

Main Points Raised

  • One participant introduces the puzzle and encourages others to think creatively without revealing the solution.
  • Another participant expresses confusion, claiming to have thought of multiple answers, suggesting ambiguity in the problem's constraints.
  • A participant points out the need for the lines to be drawn contiguously, emphasizing that each line segment must start where the previous one ended.
  • One participant shares a visual representation of the dots and suggests a method for connecting them, although the figure is later removed due to lack of a "spoiler mode."
  • Another participant acknowledges the puzzle as a classic "think-outside-the-box" challenge, recalling the strategy needed to solve it.
  • Further clarification is provided regarding the requirement for a continuous line, with an apology for the oversight in the original description of the rules.
  • Participants reflect on the nature of the puzzle, noting that it often stumps people due to self-imposed restrictions.

Areas of Agreement / Disagreement

Participants generally agree on the nature of the puzzle and its challenge, but there is some disagreement regarding the interpretation of the rules and the number of potential solutions.

Contextual Notes

The discussion highlights limitations in the initial problem description, particularly regarding the continuity of the lines and the potential for multiple interpretations of the puzzle's constraints.

The Dagda
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This ones a classic and it doesn't seem it's come up before.

But draw 9 dots in 3 rows and columns that are equidistant, now join them up with not more than 4 straight lines.

If you already know it be sure not to give the game away. Just a simple problem I thought might pass a few moments to those who haven't seen it before.
 
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i'm not sure i understand the question, because I've already thought of 5 answers
 
He forgot to say that the line (segments) have to be drawn contiguously; each line segment begins where the previous one ends.
 
A solution...
 
Last edited:
I decided to remove the figure cause there is no "spoiler mode" for figures...

For the points below

...
..1...2...3...
...
..4...5...6...
...
..7...8...9...
...

use these lines:

[3->7] [7->0] [0->10] [10->8]

......
..0....
......
..1...2...3...
......
..4...5...6...
......
..7...8...9...10
......
:smile:
 
Last edited:
This is the classic think-outside-the-box puzzle.
 
ah, yes, i remember it now. even though i remembered the basic strategy, it still took a few tries in my head to arrive at the result.
 
Hurkyl said:
He forgot to say that the line (segments) have to be drawn contiguously; each line segment begins where the previous one ends.

Oh yes apologies. It must be a continuous line, ie you're not allowed to lift your pen from the paper.

Well done those who got it, yeah it is a classic but it stumps so many people I rather like it. It's one of those puzzles were people impose rules on themselves.
 

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