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UKMT Senior Mathematical Challenge, 2024

Algebra Difficulty 1.0 Junior Find the answer United Kingdom

What is two-fifths of the recurring decimal $0.\dot{2}\dot{5}$ ?

(A) $0.\dot{1}$ (B) $0.0\dot{1}$ (C) $0.\dot{0}\dot{1}$ (D) $0.10$ (E) $0.\dot{1}\dot{0}$

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