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A puzzle based on combinatorics, which is the study of counting discrete structures. Use with [mathematics]

24 votes

Draw a line through all doors

Similar to klm's solution, this one requires a little bit of lateral thinking but doesn't actually involve walking through a wall. Instead, you have to fold the corner of the piece of paper that the p …
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19 votes

Draw a line through all doors

Alternatively, going "through" a door need not necessarily be interpreted in the same way as one would in a house. This single, continuous line passes exactly once through each door, which is the con …
ClickRick's user avatar
  • 1,823