HCU MCA 2013 Paper

(b) ${\left(24\right)}^2$ = 587
when we check the equation for different given options(b) satisfied.
${\left(24\right)}_9=2\times 9^1+4\times 9^0=18+4={\left(22\right)}_{10}$
${\left(22\right)}^2=484$
To convert 484 in base 9, divide 484 by 9 repeatedly and collect remainders from bottom to top.

i.e.,${\left(587\right)}_9$