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  1. Each of the nine dots in this figure is to be colored red, white or blue. No two dots connected by a segment (with no other dots between) may be the same color. How many ways are there to color the dots of this figure?
 Feb 28, 2020
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There are 3*2*1 = 6 ways to colors the dots in each triangle, and all triangles must be colored differently, so the number of ways to color the dots is 6*5*4 = 120.

 Feb 28, 2020

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