9 Dots, 4 Lines

[her209]

You have 9 dots arranged like a rectangle:

• ...
  ...
  ...

Without lifting your pen, draw four lines that cross all 9 dots.

If you know the answer, say that you know it and PM me.

 

[bret]

i have no clue

 

[arcenite]

Everyone knows this. It is your typical "inside the box" question.

Edit: apparently I was wrong.

 

[ribbon13]

This is a very famous problem. It was actually responsible for the cliche: "Think outside the box."

 

[her209]

Originally posted by: ribbon13
This is a very famous problem. It was actually responsible for the cliche: "Think outside the box."

😀

 

[ribbon13]

Answer sent.

 

[Wadded Beef]

http://xs.to/xs.php?h=xs23&d=05146&f=winner.png

 

[ribbon13]

Line tool!

 

[her209]

Thanks for ruining the thread Wadded Beef.

 

[EngenZerO]

so, do we get bonus points for the 3 line solution?

 

[mb]

Ugh, I did that in my management class last semester. Brings back bad memories.

 

[her209]

Originally posted by: EngenZerO
so, do we get bonus points for the 3 line solution?

Pic?

 

[arcenite]

Originally posted by: EngenZerO
so, do we get bonus points for the 3 line solution?

I believe the three line solution is the same question without the "not picking up the pen" part isn't it?

 

[Wadded Beef]

Originally posted by: her209
Thanks for ruining the thread Wadded Beef.

i do what i can 😉

 

[her209]

Originally posted by: arcenite

Originally posted by: EngenZerO
so, do we get bonus points for the 3 line solution?

I believe the three line solution is the same question without the "not picking up the pen" part isn't it?

That would be way to easy then.

 

[her209]

Originally posted by: Wadded Beef

Originally posted by: her209
Thanks for ruining the thread Wadded Beef.

i do what i can 😉

:thumbsdown:

 

[Fenixgoon]

oh going outside the box is cheating

 

[arcenite]

Originally posted by: her209

Originally posted by: arcenite

Originally posted by: EngenZerO
so, do we get bonus points for the 3 line solution?

I believe the three line solution is the same question without the "not picking up the pen" part isn't it?

That would be way to easy then.

Not if you say connect all the dots. Some people think they have to connect every dot to ... well... every dot.

 

[walla]

Originally posted by: her209
You have 9 dots arranged like a rectangle:

• . . .
  . . .
  . . .

Without lifting your pen, draw four lines that cross all 9 dots.

If you know the answer, say that you know it and PM me.

Simple. Use a pencil.

Also, if you draw out to infitity, the angle with all other points becomes zero. So theoretically you could solve this with three lines.

 

[her209]

Originally posted by: walla
Also, if you draw out to infitity, the angle with all other points becomes zero. So theoretically you could solve this with three lines.

So when does the second line begin?

 

[walla]

Originally posted by: her209

Originally posted by: walla
Also, if you draw out to infitity, the angle with all other points becomes zero. So theoretically you could solve this with three lines.

So when does the second line begin?

Infinity 🙂

 

[walla]

I've probably killed this thread...but you can also solve it with one line if you rotate the paper and keep the pen moving in the same direction

 

[EngenZerO]

Originally posted by: arcenite

Originally posted by: her209

Originally posted by: arcenite

Originally posted by: EngenZerO
so, do we get bonus points for the 3 line solution?

I believe the three line solution is the same question without the "not picking up the pen" part isn't it?

That would be way to easy then.

Not if you say connect all the dots. Some people think they have to connect every dot to ... well... every dot.

3-Line

done in three lines. you just need to have long enough paper and not so steep angles.

 

[EngenZerO]

Originally posted by: her209

Originally posted by: EngenZerO
so, do we get bonus points for the 3 line solution?

Pic?

^ up one post

 

[Koing]

Originally posted by: EngenZerO

Originally posted by: arcenite

Originally posted by: her209

Originally posted by: arcenite

Originally posted by: EngenZerO
so, do we get bonus points for the 3 line solution?

I believe the three line solution is the same question without the "not picking up the pen" part isn't it?

That would be way to easy then.

Not if you say connect all the dots. Some people think they have to connect every dot to ... well... every dot.

3-Line

done in three lines. you just need to have long enough paper and not so steep angles.

If the dots were say 1-2mm then you'd need a very long piece of paper for the 3line solution!

Funky stuff