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    Question

    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.) 

    (12.13) 2 - 19.93 + 39.78 - 42.93 =

    ?
    A 121 Correct Answer Incorrect Answer
    B 141 Correct Answer Incorrect Answer
    C 167 Correct Answer Incorrect Answer
    D 237 Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    ATQ, (12.13)2 - 19.93 + 39.78 - 42.93 = ? (12)2 - 20 + 40 - 43 ~ ? 144 + 20 - 43 ~ ? ? ~ 121

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