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    Question

    (?)2 + 9.113 = 31.92

    – 39.03  What approximate value will come in place of the question mark (?) in the following question? (Note: You are not expected to calculate the exact value.) 
    A 16 Correct Answer Incorrect Answer
    B 28 Correct Answer Incorrect Answer
    C 25 Correct Answer Incorrect Answer
    D 32 Correct Answer Incorrect Answer
    E 28 Correct Answer Incorrect Answer

    Solution

    (?)2 + 93 = 322 – 39 (?)2 + 729 = 1024 – 39 (?)2 = 985 – 729 (?)2 = 256 ? = 16

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