7, -1, 35, -55, 135, -210

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Q 2215823769.     One of the numbers is wrong in given number series. Find out the number and mark that as your answer.
7, -1, 35, -55, 135, -210
IBPS-PO 2017 Mock Mains
A

-1

B

35

C

-55

D

135

E

-210

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Solution
(Provided By a Student and Checked/Corrected by EXXAMM.com Team)

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