There is a column of colored lights, arranged according to the rule of 2 red, 3 yellow, 4 green and 5 blue. What color is the 100th colored light?
You can think of a group of 14 lights. Press 2 red, 3 yellow, 4 green and 5 blue to repeat,
100=14*7+2
That is, after 7 repetitions, the remaining 2,
So the hundredth is red
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