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DCI is 601. D = 500, C = 100, and I = 1, so 500 + 100 + 1 = 601.

Now subtract 10 [X means 10], so 601- 10 = 591.

So 500 = D, and then add 91. So 91 = 90 + 1. To get 90, do XC [100 - 10], then add 1 for XCI, so it is DXCI.

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12y ago

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