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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.) 

    √31684.11 × √728.9 – (19.02)2 = ? ×

    4.99 
    A 900 Correct Answer Incorrect Answer
    B 889 Correct Answer Incorrect Answer
    C 983 Correct Answer Incorrect Answer
    D 1189 Correct Answer Incorrect Answer
    E 1258 Correct Answer Incorrect Answer

    Solution

    √31684.11 × √728.9 – (19.02)2 = ? × 4.99  178 × 27 – 361 = ? × 5 4806 – 361 =? × 5 ? = 889

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