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

Fill in the blank space for the given series with the correct alternative.
$(2,3), (3,5), (5,7), (7,11), (11,13), (\ldots)$

Find the missing term for the given series from the given alternatives:
$A, CD, GHI, ?, UVWXY$

Choose the correct alternative for the missing term:
$DF, GJ, KM, NQ, RT, ?$

Choose the correct alternative to complete the series: $a...abbb...cccd....ddccc....bb...ba$

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

questions.

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

$'78'$ is to $'P?6'$ and $'?N'$ is to $'T32'$ in the same way as $2 E'$ is to $\ldots \ldots \ldots . . .$ in the arrangement.