$1, 15, 16, 31, 47, 78, 125, ?$

$1, 9, 25, 49, ?, 121$

Find the missing term in the series: $3, 4, 12, ?, 196$.

In the following number series,one of the numbers does not fit into the series. Identify the wrong number in the series.
$5 \quad 7.5 \quad 11.25 \quad 17.5 \quad 29.75 \quad 50 \quad 91.25$

$12, 35, 81, 173, 357, (?)$

$1, 11, 111, 1111, ?$