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.) 21 × 55 + ? × 33 – 22 × 18 = 24 × 44
    A 29 Correct Answer Incorrect Answer
    B 19 Correct Answer Incorrect Answer
    C 39 Correct Answer Incorrect Answer
    D 9 Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    ATQ,

    21 × 55 + ? × 33 – 22 × 18 = 24 × 44

    1155 + ? × 33 – 396 = 1056

    ? × 33 = 1056 + 396 – 1155

    ? × 33 = 297

    ? = 9

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