Simplification questions and Answers for competitive exams

$7 \frac{2}{7}$ of $189+452=2000-?$

68% of 595 – 43% of 372 = ?

35% of (?) = 2175.95

$(45)^{2}+(21)^{2}=(?)^{2}+257$

$90780 \div \sqrt{?}=85 \times 12$

$\frac{15 \times 11+45}{13 \times 9-30}=?$

$39852 \div \sqrt{?}=81 \times 12$

54679 + 34521 = ? + 43668

44% of 766 + ? = 900

3.3 + 13.33 + 31.13 + 13.31 + 1.3 = ?

$(16)^{2}+(21)^{2}-(13)^{2}+?=(25)^{2}$

73% of 5800 – 69% of 240 = ?

$\left(\frac{17}{119} \times \frac{98}{14}\right)^{2}=?$

$\sqrt{12321}=?$

72% of 654 – 41% of 312 = ?