Fill in the blank space for the given series with the correct alternative.
$8, 10, 14, 18, (\ldots), 34, 50, 66$

Choose the correct alternative to complete the series: $ab . . aa . . bbb . . . aaa . . bbaa$

Which number will come next in the following series?
$2, 1, 2, 1, 3, 2, 1, 3, 4, 2, 1, 3, 4, 5, 2, 1, 3, 4, 5, 6, 2, 1, 3, 4, 5, ?$

Find the wrong number in the series.
$3, 8, 15, 24, 34, 48, 63$

Study the following arrangement carefully and answer the questions given below:

$7, R,E,T ,4 ,A ,9 ,\% ,D,F, 1, U, \# ,B ,@ ,8 ,H,I ,$©$, W,M, \star, 3,2 ,V ,\$ ,5 ,N,P,6, Q$

How many such consonants are there in the above arrangement, each of which is immediately preceded by a consonant and immediately followed by a number?

Find the missing letters for the given series from the given alternatives:
$aaa....bb....aab.....baaa....bb$