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CEMC Pascal, 2007

Number theory Difficulty 3.0 AMC 10/12 Find the answer Canada

Starting with the ``1'' in the centre, the spiral of consecutive integers continues, as shown. What is the sum of the number that appears directly above 20072007 and the number that appears directly below 20072007?

(A) 40144014 (B) 40164016 (C) 40184018 (D) 40204020 (E) 40224022

Figure for this problem

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