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Answer
Let the next number in the sequence is x, then the sequence would be 7, 2, 0, 7, 8, 4, 3, x.
7 + 2 + 0 + 7 = 16
2 + 0 + 7 + 8 = 17 (16 + 1)
0 + 7 + 8 + 4 = 19 (17 + 2)
7 + 8 + 4 + 3 = 22 (19 + 3)
8 + 4 + 3 + x = 26 (22+ 4)
x = 11
