What should come in place of the question mark (?) in the following question ?
6389-1212-2828= ?
$$\frac{31}{43}\times\frac{86}{95}\times\frac{41}{93}=?$$
$$526\times12+188=50\times ?$$
$$62^{2}-32^{2}+(?^{2})=3144$$
$$\sqrt[3]{21952}+33=?$$
?% of 5600¬28% of 3500=1988
$$32000\times\frac{3}{4}\times?\times\frac{1}{2}=4800$$
$$(8536-\sqrt{2209})\times0\cdot3=?$$
$$\frac{5}{8}+\frac{1}{4}+\frac{7}{12}=?$$
For the following questions answer them individually
4,19,49,94,154, ?