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Aptitude | Series | Question 1

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  • Last Updated : 28 Jun, 2021

Find wrong number in series:
12, 25, 49, 99, 187, 395, 789
(A) 789
(B) 187
(C) 99
(D) 49


Answer: (B)

Explanation: 12*2+1 =25

25*2-1 = 49

49*2+1 = 99

395*2-1 = 789

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