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If $n^2= 12345678987654321$, what is n?

  1. 12344321
  2. 1235789
  3. 111111111
  4. 11111111
in Quantitative Aptitude
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1 Answer

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Best answer
$11^{2} $ =121

$111^{2}$ =12321

$1111^{2}$ = 1234321

Similarly

$(111111111)^{2}$ =12345678987654321.

 

Hence,option (C)111111111 .

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