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    Question

    √( (664+ √(136+ √(59+ √(21+

    √(7+ √81) ) ) ) ) ) = ? What value should come in place of the question-mark(?) in the following questions:
    A 16 Correct Answer Incorrect Answer
    B 74 Correct Answer Incorrect Answer
    C 24 Correct Answer Incorrect Answer
    D 26 Correct Answer Incorrect Answer
    E 36 Correct Answer Incorrect Answer

    Solution

    √((664+ √(136+ √(59+ √(21+ √(7+ √81)))))) = √((664+ √(136+ √(59+ √(21+ √(7+ 9)))))) = √((664+ √(136+ √(59+ √(21+ √16))))) = √((664+ √(136+ √(59+ √(21+ 4))))) = √((664+ √(136+ √(59+ √25)))) = √((664+ √(136+ √(59+ 5)))) = √((664+ √(136+ √64))) = √((664+ √(136+ 8))) = √((664+ √144)) = √((664+ 12)) = √676 = 26

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