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What number should replace the question mark? 1, 1, 4, 20, 27, ?, 254

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What number should replace the question mark? 1, 1, 4, 20, 27, ?, 254
posted Jan 31, 2020 by Prithvi

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1 Answer

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243


1*1=1 >> 1 +3 = 4 >> 4 ***5** = 20 >> 20 +7 = 27 >> 27 ***9** = 243 >> 243 +11 = 254
alternate odd numbers starting from 1 to 11, and operators * and +

answer Feb 27, 2020 by Hanifa Mammadov
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