New Enroll in RBI Grade B New Batch - Starts on May 21

    Question

    (123×123×123 + 130×130×130)/(123×123 - 123×130 +

    130×130) = ? 
    A 253 Correct Answer Incorrect Answer
    B 275 Correct Answer Incorrect Answer
    C 230 Correct Answer Incorrect Answer
    D 244 Correct Answer Incorrect Answer

    Solution

    let a = 123, b = 130 so (123×123×123+130×130×130)/(123×123-123×130+130×130) =  (a3 + b3)/(a2 - ab + b2) => ((a+b) x (a2 + b2 - ab))/( a 2 + b 2 - ab ) = (a+b) => 123 + 130 = 253 ` ` ` `

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