$6, 18, 3, 21, 7, 56, ?$

Find out the odd number from the given sequence: $142, 119, 100, 83, 65, 49, 42$.

$2, 18, 66, 210, 642, \dots$

$16, 22, 40, 78, 144, ?$

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

$589654237, 89654237, 8965423, 965423, ?$