Choose the correct alternative to complete the series: $abc....d....be....d....b...cda$

How many such $4$s are there in the following number series,each of which is immediately followed by $5$ but not immediately preceded by $3$?
$5, 4, 4, 3, 3, 4, 5, 4, 5, 5, 3, 4, 4, 3, 4, 5, 4, 3, 3, 5, 4, 5, 4, 3, 5, 4, 4, 3, 5, 4$

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?

Choose the correct alternative for the missing term:
$AD, EH, IL, ?, QT$

Fill in the blank space for the given series with the correct alternative.
$71, 76, 69, 74, 67, 72, (\ldots)$

Fill in the blank space for the given series with the correct alternative.
Which term of the series $5, 10, 20, 40, \ldots$ is $1280$?