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    Question

    20.99 × √4.09 × 30.09 = ? × √195.99 ×

    15.09 What approximate value will come in place of the question mark (?) in the following question? (You are not expected to calculate the exact value)
    A 14 Correct Answer Incorrect Answer
    B 6 Correct Answer Incorrect Answer
    C 21 Correct Answer Incorrect Answer
    D 56 Correct Answer Incorrect Answer
    E 40 Correct Answer Incorrect Answer

    Solution

    20.99 × √4.09 × 30.09 = ? × √195.99 × 15.09 => 21 × √4 × 30 = ? × √196 × 15 => 21 × 2 × 30 = ? × 14 × 15 => 1260 = ? × 210 => ? = 6

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