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What number should come to missing place: 27, 13, 12, 16.5, ?, 75

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What number should come to missing place: 27, 13, 12, 16.5, ?, 75
posted Oct 11, 2018 by anonymous

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1 Answer

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31


27 * 0.5 - 0.5 = 13
13 * 1 - 1 =12
12 * 1.5 - 1.5 = 16.5
16.5 * 2 - 2 = 31
31 * 2.5 - 2.5 = 75

answer Oct 12, 2018 by Hanifa Mammadov
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