Connect the dots

Logic Level 3

Using only straight lines and without lifting your pen from the page, what is the fewest number of lines it takes to pass through nine circles that are arranged as above?

Clarification: The circles have a very small but finite radius.

7 4 8 5 3 1 6 2

David Pilling by David Pilling , 18, USA

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2 solutions

Siva Budaraju
Apr 16, 2017

this is the solution, but a loophole is that the problem did not say how thick the lines can be. So, if you had a giant pen, you could draw 1 thick line covering all the dots.

1 Helpful 0 Interesting 0 Brilliant 0 Confused
David Pilling
May 20, 2016

1 Helpful 0 Interesting 0 Brilliant 0 Confused

Given that the dots do have a finite size, 3 VERY long straight lines could be used to join them. HOWEVER, I answered '1' since the question did not stipulate that the line(s) had to be straight. IMO, the question is a bit too ambiguous.

Martin Gray - 5 years ago

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Did the same. 1 would be the answer

Jo Ro - 4 years, 12 months ago

Updated the question to be more clear

David Pilling - 4 years, 12 months ago

I put 1 because it did not say how big we can have the lines....

Asim Poptani - 4 years, 12 months ago

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