CombinatoricsDifficulty 2.0JuniorFind the answerUnited Kingdom
Ali, Bev and Chaz never tell the truth. Each of them owns exactly one coloured stone that is either red or green. Ali says, "My stone is the same colour as Bev's". Bev says, "My stone is the same colour as Chaz's". Chaz says, "Exactly two of us own red stones". Which of the following statements is true?
(A) Ali's stone is green (B) Bev's stone is green (C) Chaz's stone is red (D) Ali's stone and Chaz's stone are different colours (E) None of the statements A to D are true
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