Choose the Correct Alternative Number and Complete the Series

A.  4, 8, 28, 80, 244, ?

  1. 252
  2. 428
  3. 628
  4. 728

B. 165, 195, 255, 285, 345, ?

  1. 375
  2. 390
  3. 420
  4. 405

C. 4, 10, ?, 82, 244, 730

  1. 24
  2. 28
  3. 77
  4. 56

D. 10000, 11000, 9900, 10890, 9801, ?

  1. 10261
  2. 10425
  3. 10781
  4. 10771
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  • 1 Answer(s)

    (A) Answer: (4) 728.
    Explanation:-
    31 = 3+ 1 = 4
    32 = 9 – 1 = 8
    33 = 27 + 1 = 28
    34 = 81 – 1 = 80
    35 = 243 + 1 = 244
    36 = 729 – 1 = 728

    Hence, the answer is 728.

    (B) Answer: (1) 375.
    Explanation:-

    165 + 30 = 195
    195 + 60 = 255
    255 + 30 = 285
    285 + 60 = 345
    345 + 30 = 375
    Hence, the answer is (1) 375.

    (C) Answer: (2) 28
    Explanation:-
    31 + 1 = 4
    32 +1 = 10
    33 + 1 = 28
    34 + 1 = 82
    35 + 1 = 244
    36 + 1 = 730
    Hence, the answer is (2) 28.

    (D) Answer: (3) 10781
    Explanation:-
    We add and subtract 10% in the term
    Thus, 10000+ (10% of 10000)
    = 10000 + 1000 = 11000;

    = 11000-(10% of 11000)
    =  11000 – 1100 = 9900:

    9900+ (10% of 9900)
    = 9900 + 990 = 10890;
    10890 – (10% of 10890)
    = 10890 – 1089 = 9801;
    So, missing term=9801+ (10% of 9801) = 9801+980=10781.

    Hence, the answer is (3) 10781.

    Anurag Mishra Professor Answered on 9th June 2015.
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