Question

    What is the approximate value should come in place of question mark (?) in the following questions? (You are not needed to calculate the exact value)

    ?² x 8 - 320 = 513

    A 9 Correct Answer Incorrect Answer
    B 10 Correct Answer Incorrect Answer
    C 11 Correct Answer Incorrect Answer
    D 12 Correct Answer Incorrect Answer
    E 8 Correct Answer Incorrect Answer

    Solution

    ?² x 8 - 320 = 513 ?² x 8 =320 + 513 ?² x 8 = 833 ?² = 104.125 = Approx. 100 So ? = 10

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