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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.)

    ?2 + (39.99 × 10.99 + 7.01) - (39.99 ×

    2.992 + 21.99) = 21.99 × 23.01
    A 21 Correct Answer Incorrect Answer
    B 65 Correct Answer Incorrect Answer
    C 45 Correct Answer Incorrect Answer
    D 95 Correct Answer Incorrect Answer
    E none of these Correct Answer Incorrect Answer

    Solution

    ATQ, ?2 + (39.99 × 10.99 + 7.01) - (39.99 × 2.992 + 21.99) = 21.99 × 23.01 ?2 + (40 × 11 + 7) - (40 × 32 + 22) = 22 × 23 ?2 + (440 + 7) - (360 + 22) = 22 × 23 ?2 + 447 - 382 ~ 22 × 23 ?2 + 65 ~ 506 ?2 ~ 441 ? ~ 21

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