$1800, 540, 162, 48.6, ?$

Find the next term in the series: $20, 24, 36, 56, 84, ?$

In the following number series,one of the numbers does not fit into the series. Mark the wrong number in the series.
$35 \quad 118 \quad 280 \quad 600 \quad 1238 \quad 2504 \quad 5036$

Find the odd man out:
$190, 166, 145, 128, 112, 100, 91$

$2, 5, 17.5, 43.75, ? (\text{in } 153.125)?$

$4, 10, 33, 136, \dots$