Find out the wrong term from the given series.
$5, 10, 40, 80, 320, 550, 2560$

Find the missing term for the given series from the given alternatives:
$C, B, A, E, D, Z, G, F, (?)$

Find out the wrong term from the given series.
$1, 2, 6, 15, 31, 56, 91$

Fill in the blank space for the given series with the correct alternative.
$20, 19, 17, (\ldots), 10, 5$

Study of the following arrangement carefully and answer the questions given below.

$Q,E ,* ,P,M ,8 ,R,A ,@ ,C ,9 ,U,H,W, \# ,J,Z, ,S, \beta, Y,N ,5 ,\$ ,G,I,T$

If the first element in the above arrangement exchanges its position with the element in the $26 th$ position and the second with the one in the $25 th$ position and so on, which of the following will be in the tenth position from the left after rearrangement?

Fill in the blank space for the given series with the correct alternative.
$4, 9, 5, 12, 7, 15, 8, (\ldots), 10$