Practice Test Discussion

Q)

(94)2+ (?)2= (145)2−(56)2−3869

[UBI (PO), 2009]

    • Explanation

    Here,(?)2= (145)2−(56)2−3869−(94)2        = (145)2−{562+ 3869 + (94)2}       = (145)2−{3136 + 3869 + 8836}       = 21025−{15841} = 5184or     ? = 5184 = 72

    Hence Option B is correct.

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