In the given series one word/one term/one number is missing. Select thecorrect alternative from the given ones that will complete the series.
13, 11, 8, ?, -1
The series folows the pattern as,
13 - 2 = 11Â
11 - 3 =Â 8
8 - 4 = 4
4 - 5Â = -1
$$\therefore$$ The correct answer is option C.
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