Find the next number in the series: $120, 99, 80, 63, 48, ?$

$6$	$3.5$	$4.5$	$8.25$
$40$	$(a)$	$(b)$	$(c)$	$(d)$	$(e)$

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

Find the odd number in the given sequence: $216, 214, 211, 206, 200, 188$.

In the following number series,only one number is wrong. Find out the wrong number.
$18 \quad 119 \quad 708 \quad 3534 \quad 14136 \quad 42405$

$123 \quad 140 \quad 106 \quad 157 \quad 89 \quad ?$

Find the next term in the series: $1, 5, 13, 25, 41, ?$