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    Question

    If '+' means 'x', '-' means '÷', 'x' means '+' and

    '÷' means '-', what will come in place of the question mark (?)? 12 + ? - 6 x 20 ÷ 5 = 55
    A 15 Correct Answer Incorrect Answer
    B 20 Correct Answer Incorrect Answer
    C 25 Correct Answer Incorrect Answer
    D 30 Correct Answer Incorrect Answer

    Solution

    12 + ? - 6 x 20 ÷ 5 = 55 12 x ? ÷ 6 + 20 – 5 = 55 2 x ? + 20 – 5 = 55 2 x ? + 15 = 55 2 x ? = 55 – 15 2 x ? = 40 ? = 20 Therefore, '20' will come in place of the question mark.

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