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UKMT Junior Kangaroo, 2017

Number theory Difficulty 2.0 Junior Find the answer United Kingdom

The multiplication $abc \times de = 7632$ uses each of the digits $1$ to $9$ exactly once. What is the value of $b$ ?

(A) $1$ (B) $4$ (C) $5$ (D) $8$ (E) $9$

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