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    Question

    What approximate value should come in place of (?) in the following questions?

    287.97 ÷ √323.99 = ? + 4.05-2 ×

    64.05
    A 12 Correct Answer Incorrect Answer
    B 18 Correct Answer Incorrect Answer
    C 16 Correct Answer Incorrect Answer
    D 20 Correct Answer Incorrect Answer
    E 21 Correct Answer Incorrect Answer

    Solution

    287.97 ÷ √323.99 = ? + 4.05-2 × 64.05 => 288 ÷ √324 = ? + 4-2 × 64 => 288 ÷ 18 = ? + 4-2 × 64 => 16 = ? + (1/16) × 64 => ? = 16 – 4 => ? = 12

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