There are three houses, and three utilities: water, gas, and electricity.
Your task is to connect each house to all three utilities.
Therefore each house will have three lines and each utility will also have three lines.
However, you cannot cross lines! You cannot pass lines through houses or utilities. You cannot share lines.
Can you draw the 9 lines required?
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Answer
This puzzle is a classic one that has no solution in 2D.
However, if you place the items on a doughnut shape in 3D you can solve it.
In the picture below, the electricity is linked to House 3 by going over the top and re-entering through the hole in the middle.
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