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Numbers - General Aptitude

Q1:

{(476 + 424)2 - 4 x 476 x 424} = ?

A 2906

B 3116

C 2704

D 2904

E None of these

ANS:C - 2704

Given Exp. = [(a + b)2 - 4ab], where a = 476 and b = 424
  = [(476 + 424)2 - 4 x 476 x 424]
  = [(900)2 - 807296]
  = 810000 - 807296
  = 2704.