What should come in place of question mark (?) in the following questions?
$$3\frac{3}{4} \times 4\frac{5}{6} - ?=2\frac{3}{4}$$
$$\sqrt{?}+15^{2}=235$$
$$\frac{34 \times 4-12 \times 8}{6^{2}+\sqrt{196}+(11)^{2}}=?$$
2.03% of 1400+4.2% of 450=?
$$3960 \div 24 \times 392 \div 14=?$$
What should come in place of the question mark (?) in the following number series ?
8, 39, 155, 464, ?
4, 5, 14, 51, ?
7, 8, 17, 42, ?
5, 6, 15, 50, ?
729, 243, 81, 27, ?