What will come in place of the question mark(?) in the following questions ?
$$\frac{5}{9} of 315+\frac{3}{7} of 455=?$$
145% of 780+?% of 250=1231
$$\frac{5}{8} of \frac{2}{3} of \frac{3}{5} of 2104=?$$
$$16.45 \times 5.2 \times 2.5=?$$
2.25% of 640-1.5% of 480=?
What will come in place of question mark (?) in the following number series ?
11, 12, 26, 81, ??
5120, 1280, 320, 80, ??
7, 11, 27, 63, ?
6, 10, 18, 34, ??
5, 11, 23, 47, ??