In professor layton what is the answer for puzzle 21?

In professor layton and the lost future.|||You can see a PICTURE showing exactly where to draw the line (on the answer screen) on this page of the most popular walkthrough

http://professorlayton3walkthrough.blogs鈥?/a>



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Contrary to what others have said, the answer is NOT 8|||You can turn the bottle left or right and it will still work. A diagnal line divides the long rectangle into two. Twist it 45 degress to the left and then draw the line from the bottom left hand corner of the top square to the bottom right hand corner of the far right square.|||The answer should be 8, though you could have googled this instead of waiting for people to answer.