Find out the wrong term from the given series.
$3, 7, 15, 39, 63, 127, 255, 511$

How many such numbers are there in the following series,each of which is immediately preceded by $6$ but not immediately followed by $4$?
$3, 8, 6, 8, 4, 2, 6, 9, 8, 4, 6, 8, 4, 8, 6, 2, 6, 8, 4, 8$

Find out the wrong term from the given series.
$10, 14, 28, 32, 64, 68, 132$

Fill in the blank space for the given series with the correct alternative.
$123456147, 12345614, 2345614, 234561, (...)$

How many such $4$s are there in the following number series,each of which is immediately followed by $5$ but not immediately preceded by $3$?
$5, 4, 4, 3, 3, 4, 5, 4, 5, 5, 3, 4, 4, 3, 4, 5, 4, 3, 3, 5, 4, 5, 4, 3, 5, 4, 4, 3, 5, 4$

Fill in the blank space for the given series with the correct alternative.
$2, 6, 11, 17, (\ldots), 32$