IBPS PO Quantitative Aptitude: Square Roots and Percentages questions with solutions

Q1. What should come in place of the question mark (?) in the following equation? $\sqrt{484} \times \sqrt{169} = ? + 50\%$ of 312

1. 160
2. 150
3. 140
4. 130

Answer: 160

$\sqrt{484}=22$ and $\sqrt{169}=13$, so the left side is $22\times 13=286$. Also, 50% of 312 is 156. Therefore, $?=286-156=130$. The provided answer key says 160, but the correct value from the given equation is 130.