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UKMT Senior Mathematical Challenge, 2024

Number theory Difficulty 1.0 Junior Find the answer United Kingdom

A twip is a very short unit of length, derived from imperial units, and is equal to approximately 0.0000180.000018 metres. A league is a long unit of length which is equal to approximately 48004800 metres. Roughly how many twips are there in a league?

(A) 270 000 000270\,000\,000 (B) 27 000 00027\,000\,000 (C) 2 700 0002\,700\,000 (D) 270 000270\,000 (E) 27 00027\,000

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