Which one of the following is the correct order of missing letters in the series given below?
$....sttt...tt...tts....$

Find the missing letters for the given series from the given alternatives:
$.....bca......cca....ca.....b.....c$

Fill in the blank space for the given series with the correct alternative.
$5, 16, 49, 104, (...)$

Choose the correct alternative to fill in the blanks in the series: $ab...bcbca...c...bab$

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

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

Four of the following five are alike in a certain way based on the positions of the elements in the arrangement and hence form a group. Which one does not belong to the group?

Study the following arrangement carefully and answer the question given below:
$R, 4, E, J, 5, T, 1, A, M, Q, 3, 8, N, I, K, 7, W, F, 6, D, 9, U, 2, Y, V$
How many such numbers are there in the above arrangement,each of which is immediately preceded by a consonant but not immediately followed by a consonant?