The beautiful but not so bright Countess was recently swindled out of some of her jewels. She knew that her diamond ring has nine diamonds down each side, across the top and across the bottom, but she had never really noticed the arrangement. A clever thief had rearranged the diamonds so that there were only twenty, yet leaving the Countess still believing that there were still nine diamonds on each side. How did he reset the jewels to get away with it?

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