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UKMT Senior Mathematical Challenge, 2018

Algebra Difficulty 2.0 Junior Find the answer United Kingdom

Which of the following is equal to $25\times 15\times 9\times 5.4\times 3.24$ ?

(A) $3^9$ (B) $3^{10}$ (C) $3^{11}$ (D) $3^{14}$ (E) $3^{17}$

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