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MCQIntermediateMathematical & Experimental Methods
BAAO — 2021 Astronomy & Astrophysics Challenge
Question 2
The website what3words splits up the Earth’s surface into 3 m × 3 m squares and gives a co-ordinate of three randomly chosen words (for example the entrance to the Oxford University Physics Department is engage.proud.police). If each of the words is taken from the same list of n words, what value of n is needed?
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Source
Source: British Astronomy and Astrophysics Olympiad (BAAO), Astronomy & Astrophysics Challenge 2021. Question text, answer-choice text, and answer were transcribed from the official BAAO paper and solutions PDFs; the explanation and metadata are original.