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Question
What number should come next?
7 9 66 12 14 66 17
Options:
A .  19 66
B .  66 19
C .  19 22
D .  20 66
E .  66 20
Answer: Option A


This is an alternating addition series with
repetition, in which a random number, 66,
is interpolated as every third number. The
regular series adds 2, then 3, then 2, and so on, with 66 repeated after each "add 2 step.



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