Find the missing number

Ques.9
(a) 324
(b) 289
(c) 441
(d) 361

Anurag Mishra Professor Asked on 2nd March 2016 in Reasoning Questions.
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  • 1 Answer(s)

    Answer: (a) 324

    Explanation:-
    The square root of 169 = 13, 
    The square root of 64 = 8, 
    The square root of 81 = 9

    Then, the sum of the square roots = 13 + 8 + 9 = 30. 

    The square root of 1296 = 36, 
    The square root of 576 = 24, 
    The square root of 100 = 10.

    Then, the sum of the square roots = 36 + 24 + 10 = 70. 

    Same as, 
    The square root of 625 = 25, 
    The square root of 49 = 7, 
    The square root of( ? )^1/2 =  

    Then, 
     25 + 7 + ? = 50
    ? = 50 – 32
    ? = (18)^2
    ? = 18 x 18
    ? = 324.

    Hence, the correct answer is option (a) 324.  

    Anurag Mishra Professor Answered on 2nd March 2016.
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