Find the missing number and letters in the following series C 81 E 64 ? 49 I ? K

Find the missing number and letters in the following series C 81 E 64 ? 49 I ? K
(a) G, 36
(b) F, 36
(c) G, 32
(d) H, 24

Anurag Mishra Professor Asked on 2nd March 2016 in Reasoning Questions.
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    Answer: (a) G, 36 

    Explanation:-
    C + 2 = E  &   (9 – 1)^2  = (8)^2 => 64,

    Same as, 
    E + 2 = G  and  (7 – 1)^2 = (6)^2  => 36.

    Then, the missing number and letters in the series are G, 36. 

    Hence, the correct answer is option (a) G, 36. 

    Anurag Mishra Professor Answered on 2nd March 2016.
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