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UKMT Junior Mathematical Challenge, 2015

Number theory Difficulty 1.0 Junior Find the answer United Kingdom

Which of the following is divisible by all of the integers from 1 to 10 inclusive?

(A) $23 \times 34$ (B) $34 \times 45$ (C) $45 \times 56$ (D) $56 \times 67$ (E) $67 \times 78$

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