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    Question

    Which number should replace both the question marks in

    the following equation? ?/432 = 243/?
    A 308 Correct Answer Incorrect Answer
    B 312 Correct Answer Incorrect Answer
    C 324 Correct Answer Incorrect Answer
    D 316 Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    Let the number (?) be x x/432= 243/x x2 = 432 × 243 =216× 2×81×3 = 63×2×34×3 = 63×6×34= 64 ×34 = 184 = ((18)2)2 = (324)2 x2= 3242 x = 324

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