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    Question

    What value should come in place of the question-mark(?) in the following questions:

    {(12√5 + 6√5 )} ×{(10√5 -

    5√5 )} - 8² + 6² = ?
    A 567 Correct Answer Incorrect Answer
    B 422 Correct Answer Incorrect Answer
    C 273 Correct Answer Incorrect Answer
    D 389 Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    {(12√5 + 6√5 )} × {(10√5 - 5√5 )} - 8² + 6² = ? {√5(12 + 6)} × {√5(10 - 5)} – 64 + 36 = ? 18√5× 5√5 – 64 + 36 18 × 5 × 5 – 64 + 36 450 – 64 + 36 = 422

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