Choose the correct alternative from the given ones that will complete the series :

Directions: In the following 2 questions, a series is given, with one term missing. Choose the correct alternative from the given ones that will complete the series.

  1. 3, 11, 31, 57, 91, 133, ____
    (a) 181                           (b) 143                        (c) 183                         (d) 151
  2. 8, 16, 48, 96, 288, 576, _____
    (a) 1052                       (b) 1728                       (c) 2880                      (d) 1152
Anurag Mishra Professor Asked on 27th December 2015 in Reasoning Questions.
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1 Answer(s)

1. Answer:  (c) 183

Explanation:-

(1)² + 2= 3
(3)² +4 = 13
(5)² +6 = 31
(7)² +8 =57
(9)² +10 =91
(11)² +12 = 133
so, (13)² + 14 =183

Then, the next number is (c) 183, 

Hence, the correct answer is option (c) 183. 

2.  Answer: (b) 1728 

Explanation:- 
8 x 2 = 16,  16 x 3 = 48,   48 x 2 = 96,    96 x 3 = 288,   288 x 2 = 576, 
Same as,  576 x 3 = 1728

Then, the next number is 1728. 

Hence, the correct answer is option (b) 1728. 

Anurag Mishra Professor Answered on 27th December 2015.
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