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Four Knife Challenge

The Challenge
Place three cups face down making an equilateral triangle (all angles equal) so that the side lengh of the triangle is an inch or two longer than a butter knife. The challenge is to suspend the four butter knives on top of the three cups, where each of the knives must be touching at least one other knife.
How It's Done
You actually only need three knives to do this, the fourth is simply to throw you off. I will be adding a diagram of the solution, for now I'll just write that you put the thick end of each of the three knives on their own cup and point the knives inwards getting them to each support over and under one of the other knives. Then just lay the fourth knife across the center.