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16, 1, 4, 12, -2, ?

Category:	Math
Submitted By:	CrazyPineapple
Fun:	(1.92)
Difficulty:	(1.83)

What number can replace the question mark in the puzzle? There is a pattern!

1, 2, 15, 12

-9, 10, 20, 43, -3, -1, -30

8, 17, 4, 1

16, 1, 4, 12, -2, ?

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