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Number theory Difficulty 3.0 AMC 10/12 Find the answer United Kingdom

When 56555655 is divided by a two-digit positive integer NN, the remainder is 1111. When 58795879 is divided by the same positive integer NN, the remainder is 1414. What is the sum of the digits of NN?

(A) 66 (B) 77 (C) 88 (D) 99 (E) 1010

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