Practice Test Discussion

Q)

653×749=?

[PNB(PO), 2010]


  • Explanation

    In this above question,

     Here, ?= 653×749 = (701−48)×(701 + 48= (701)2−(48)2     [∵a2−b2=(a+b)(a−b)] = 491401−2304=489097

    Hence, option E is correct.

     

     

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