Choose the correct alternative for the missing term in the series: $ejo, tyd, ins, xch, ?$

To answer these questions study carefully the following arrangement of letters, digits and symbols.

$6, =, C, E, 3, 8, G, L, M, 7, \star, @, P, R, 4, \#, \$, N, T, 5, S, V$

How many such symbols are there in the arrangement each of which is immediately preceded by a number?

Which term will replace the question mark in the series:
$ABD, DGK, HMS, MTB, SBL, ?$

Fill in the blank space for the given series with the correct alternative.
$4, 10, (\ldots), 82, 244, 730$

These questions are based on the following set of numbers.
$738, 495, 329, 653, 849$
If $1$ is subtracted from the last digit of each number and then the numbers are arranged in descending order,which number will be the first?

Study the following arrangement carefully and answer the question given below:
$B, 2, I, J, K, 4, 3, H, 5, E, R, P, 6, N, A, 9, W, 8, T, U, 1, V, D, 7, F$
How many such numbers are there in the above arrangement,each of which is immediately preceded by a vowel and immediately followed by a consonant?