Fill in the blank space for the given series with the correct alternative.
$3, 10, 20, 33, 49, 68, (\ldots)$

The following questions are based on the five three-digit numbers given below:
$972, 526, 487, 359, 251$
If $2$ is added to the sum of the digits of each of the above numbers,how many will be multiples of $5$?

Find the missing letters for the given series from the given alternatives.
$ba.....ba.....bac......acb......cbac$

How many such numbers are there in the following series,each of which is immediately preceded by $6$ but not immediately followed by $4$?
$3, 8, 6, 8, 4, 2, 6, 9, 8, 4, 6, 8, 4, 8, 6, 2, 6, 8, 4, 8$

These questions are based on the following arrangement. Study it carefully and answer the questions.

$J ,\star, R, 3, P,L ,2 ,\# ,I,N, 7, O,C, @ ,K, 5, D, =, M, \$, 6, B, > ,A ,Q ,4$

How many such numbers are there in the above arrangement which are not immediately followed by a symbol and also are immediately preceded by a consonant?

Find the missing terms for the given series from the given alternatives:
$A, Z, X, B, V, T, C, R, (?), (?)$