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What number should replace the question mark in this sequence? 6; 11; 9; 14; 12; 17; 15; ?; 18

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What number should replace the question mark in this sequence? 6; 11; 9; 14; 12; 17; 15; ?; 18
posted Nov 25 by Brijesh Talwar

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3 Answers

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20


6; 11; 9; 14; 12; 17; 15; 20; 18
there are 2 series in one with the increment of 3:
6-9-12-15-18
11-14-17-20

answer Nov 25 by Hanifa Mammadov
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20... as once you add 5 to the prev number and then sub 2

answer Nov 25 by Razon Avi
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20 is the answer. The pattern is +5, -2.

answer Nov 26 by Taylor Noel
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