Maths Olympiad Prep

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, 2015

Number theory Difficulty 2.0 Junior Find the answer United Kingdom

Given four different non-zero digits, it is possible to form 24 different four-digit numbers containing each of these four digits. What is the largest prime factor of the sum of the 24 numbers?

(A) 2323 (B) 9393 (C) 9797 (D) 101101 (E) 113113

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