I’ve been bothered with this puzzle since about 9th grade (I’m now in the army) I’ve tried off and on to figure it out when I was bored and can’t seem to come up with a solution.
The object is to get Water [W] Electricity [E] and Gas [G] to each House [H] by drawing a line from and two each one. That means 9 lines all together, none of which can cross or touch. The setup looks like this:
[H] [H] [H] [W] [G] [E]
Use your imagination or some paper to spread them out a little.
I personally don’t think it can be done, but am interested in other opinions.