Find the next term in the series: $7, 11, 19, 35, ?$

In each of the following questions a number series is given. After the series a number is given followed by $(a),$ $(b),$ $(c),$ $(d),$ and $(e).$ You have to complete the series starting with the number given,following the sequence of the original series and answer the questions that follow the series.

$85$	$43$	$44$	$67.5$	$137$	$345$
$125$	$(a)$	$(b)$	$(c)$	$(d)$	$(e)$

What will come in place of $(c)?$

$8, 9, 8, 7, 10, 9, 6, 11, 10, ?, 12$

What will come in place of the question mark $(?)$ in the following number series?
$1, 3, 6, 10, 15, ?$

$19, 97, 162, 214, 253, ?$

Find the odd number from the given sequence: $2, 10, 18, 54, 162, 486, 1458$.