16, 1, 4, 12, -2, ?Math brain teasers require computations to solve.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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