Choose the correct alternative for the missing term:
$Q1F, S2E, U6D, W21C, ?$

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?

Fill in the blank space for the given series with the correct alternative.
$9, 12, 11, 14, 13, (\ldots), 15$

Choose the correct alternative for the missing term.
$2Z5, 7Y7, 14X9, 23W11, 34V13, ?$

The following question is based on the five three-digit numbers given:
$513, 248, 371, 634, 167$
Which of the following represents the sum of all three digits of the lowest number among them?

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