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Join 9 dots with only 4 straight lines
3 Answers
Draw this pattern:-
. . .
. . .
. . .
Now try to join all the dots with a maximum of 4 straight lines without going over the same line twice.
For the solution see joindave.co.uk
. . .
. . .
. . .
Now try to join all the dots with a maximum of 4 straight lines without going over the same line twice.
For the solution see joindave.co.uk
Answers
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Draw the first line beginning at dot 1 and continuing diagonally down and right, pass through dot 5 to reach dot 9.
From dot 9, the second line is drawn upwards, passing through dot 6 and dot 3 to end above dot 3.
The key to solving this puzzle with 4 straight lines joined continuously -- often described as "drawn without lifting the pencil off the paper" -- is to end the second line far enough above dot 3 that the third line drawn diagonally down and left will pass through dots 2 and 4, ending left of and level with dot 7.
Finally, the fourth and last line is drawn horizontally across to the right, passing through dots 7 and 8, ending back at dot 9.
From dot 9, the second line is drawn upwards, passing through dot 6 and dot 3 to end above dot 3.
The key to solving this puzzle with 4 straight lines joined continuously -- often described as "drawn without lifting the pencil off the paper" -- is to end the second line far enough above dot 3 that the third line drawn diagonally down and left will pass through dots 2 and 4, ending left of and level with dot 7.
Finally, the fourth and last line is drawn horizontally across to the right, passing through dots 7 and 8, ending back at dot 9.
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