CombinatoricsDifficulty 2.0JuniorFind the answerUnited Kingdom
Twelve coloured cubes are arranged in a row. There are 3 blue cubes, 2 yellow cubes, 3 red cubes and 4 green cubes but not in that order. There is a yellow cube at one end and a red cube at the other end. The red cubes are all together within the row. The green cubes are also all together within the row. The tenth cube from the left is blue. What colour is the cube sixth from the left?
(A) green (B) yellow (C) blue (D) red (E) red or blue
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