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

Find the missing terms for the given series from the given alternatives:
$R, M, (?), F, D, (?)$

Find out the missing term for the given series from the given alternatives:
$AZ, BY, CX, ?$

Study carefully the following arrangement of letters, digits and symbols to answer these

questions.

$M, 7 , \# , 8, L ,P ,@ ,Q ,N ,\beta ,T ,Y ,3 ,2 ,= ,E ,\$ ,4 ,9 ,*, G ,H ,5$

If all the numbers are deleted from the arrangement, then which of the following will be fifth to the right of the $13^{th}$ element from the right end?

Choose the correct alternative for the missing term.
$C4X, F9U, I16R, ?$

Choose the correct alternative to fill in the blanks in the series: $....\,,\;....aba....\,,\;....ba.....ab$