Draw the Envelope
Below is a drawing of an envelope with the flap open.
Grab your pencil and paper and try to draw it yourself.
Don't lift your pencil off the paper; the line must be continuous.
Don't go over any part of the line twice.
Don't cross the line.
HintStart in a corner with an odd number of lines.
AnswerFollow the numbers 1, 2, ... 10.
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