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Number theory Difficulty 2.0 Junior Find the answer United Kingdom

Every day Freya writes down the date in her diary and calculates the sum of the digits she writes. For example, on 11th June, she writes 11/06 and calculates $1 + 1 + 0 + 6 = 8$ . What is the largest daily sum she calculates over the course of a year?

(A) $8$ (B) $13$ (C) $16$ (D) $20$ (E) $23$

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