What will come in place of question mark (?) in the following questions ?
$$17\frac{2}{5} \times \frac{5}{8} + ?=46\frac{7}{8}$$
$$5616 \div 18 \div 8=?$$
$$420 \div 28 \times 288 \div 32=?$$
$$22^{2}+\sqrt{?}=516$$
45% of 660+28% of 450=?
What will come in place of question mark (?) in the following number series ?
12, 16, 24, 40, ??
9, 19, 39, 79, ??
8, 17, 42, 91, ??
7, 8, 18, 57, ??
3840, 960, 240, 60, ??