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

These questions are based on the following set of numbers.
$738, 495, 329, 653, 849$
If $1$ is subtracted from the last digit of each number and then the numbers are arranged in descending order,which number will be the first?

Choose the correct alternative to fill in the blanks in the series: $....bbca....bcca......ac.....a...cb$

To answer these questions study carefully the following arrangement of letters, digits and symbols.

$6,=, \#, C,E, 3,8 ,G,L,M, 7, \star, @ ,P,R, 4, \$,N,T, 5, S,V$

If all the digits in the arrangement are removed, then which of the following will be the $8^{th}$ to the right of the $15^{th}$ element from the right end?

Fill in the blank space for the given series with the correct alternative.
$5, 16, 49, 104, (...)$

Find out the wrong term from the given series:
$6, 14, 30, 64, 126$