What will come in the place of the question mark(?) in the following questions?
$$40.83\times1.20\times1.2=?$$
$$3\frac{1}{3}\div6\frac{3}{7}\times1\frac{1}{2}\times\frac{22}{7}$$=?
$$\sqrt{1.5625}$$=?
$$3978+112\times2=?\div2$$
$$\left\{10^{3.7}\times10^{1.3}\right\}^2=10^?$$
In each of the following number series, a wrong number is given. FInd out the wrong number.
2, 3, 6, 18, 109, 1944, 209952
1 3 6 11 20 39 70
2 13 27 113 561 3369 23581
50 51 47 56 42 65 29
3 9 23 99 479 2881 20159