What should come in place of the question mark (?) in the following questions?
$$(?)^{2}+15^{2}-33^{2}=97$$
$$(7921 \div 178) - 5.5 = \sqrt{?}$$
$$\frac{9}{10}+\frac{3}{11}+\frac{7}{15}= ?$$
1/4th of 1/2 of 3/4th of 52000=?
$$\frac{57}{67}\times\frac{32}{171}\times\frac{45}{128}=?$$
$$283 \times 56 + 252 = 20 \times ? $$
$$(5863-\sqrt{2704})\times0.5=?$$
$$\sqrt[3]{42875}-?=21$$
$$25639 - 5252 - 3232 = ?$$
What should come in place of the question mark (?) in the following number series?
1, 5, 13, 29, ?, 125, 253