- how to prove this question?
thank you so much for replying
Draw a circle. Place 3 dots along the circumference of the circle. We want to color the sections between the dots (each section gets exactly one color) so that no dot is touched by two sections of the same color. How many colors do we need? What about if we place 4 dots around the circumference of the circle? Or 5? In general how many colors are required when you have n dots?