Find the missing term in the series: $2, 6, 12, 20, 30, ?$

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

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 symbols in the arrangement are removed, then which of the following will be the $7^{th}$ to the left of the $13^{th}$ element from the left end?

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?

Fill in the blank space for the given series with the correct alternative.
$0, 2, 6, (\ldots), 20, 30, 42$

Find out the wrong term from the given series.
$1, 5, 5, 9, 7, 11, 11, 15, 12, 17$