For the following questions answer them individually
$$494\div 38 \times (?) = 832 \div 4$$
27.831- 31.425+18.749-(?) = 12
18.5% of 320 + 7.4% of 450 = ?
13.013 - 22.104 + 62.903 - 9.048 = ?
$$2\frac{3}{4} \times 5\frac{5}{7} \div 2\frac{4}{9} - (?)=4$$
18% of 350+ 12% of 600 =?
(?)% of 432 $$\times$$ 5 = 540
$$18 \times \sqrt{1156} \div 17 = (?)^{2}$$
$$3\frac{3}{4} \div 2\frac{1}{2} \times 4\frac{1}{2} + 1\frac{3}{4}=?$$
143.94 + 36.78 - 71.63 = ?