A number added to its square gives 132. The twice of the number is

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Solution

The correct option is C
22

Do not calculate since options are twice the number, see only options with ever number will satisfy. i.e. 24 or 22
Divide it by 2, will give 12 or 11
Now check 12 + 12 $^{2}$ $\Rightarrow$ 156

11+11 $^{2}$ = 132.

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