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
99*2-1=197
197*2+1=395
395*2-1 = 789
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