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Find the missing number?

Question asked by Venkat Sai Nakkina in #Coffee Room #Brainy Puzzles on Mar 25, 2020
Venkat Sai Nakkina
Venkat Sai Nakkina · Mar 25, 2020
Rank C3 - EXPERT

10, 14, 18, 11, 15, ?, 12, 16, 20, 13, 17, 21

Posted in: #Coffee Room #Brainy Puzzles
Ramani Aswath
Ramani Aswath · Mar 25, 2020
Rank A1 - PRO

19

The value increases by 4 for three numbers till 18. The next number decreases by 7 to 11. The next two increase by 4 (so 15 , 19). The next is again 7 less to 12 increasing by 4 to 16, 20. Again a decrease of 7 and so on.

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