Question

    ? × [(16.87) 2 – (6.98) 2 ] =

    5.04× 191.11 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 18 Correct Answer Incorrect Answer
    B 4 Correct Answer Incorrect Answer
    C 28 Correct Answer Incorrect Answer
    D 45 Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    ATQ, ? × [(16.87)2 – (6.98)2 ] = 5.04× 191.11 ? × [(17)2 – (7)2 ] ~ 5 × 191 ? × (289 – 49) ~ 955 ? × 240 ~ 955 ? ~ 955/240 ? ~3.97 ? ~ 4

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