$66, 36, 18, ?$

$18, 27, 49, 84, 132, (?)$

$8, 64, 216, 512, \dots$

$4$	$9$	$25$	$103$
$3$	$(a)$	$(b)$	$(c)$

Which of the following numbers will come in place of $(c)$?

In the following number series,a wrong number is given. Find out that wrong number.
$16 \quad 19 \quad 21 \quad 30 \quad 46 \quad 71 \quad 107$

Find the next number in the series: $462, 552, 650, 756, 870, 992, ?$