Fill in the blank space for the given series with the correct alternative.
$2, 5, 9, 19, 37, (...)$

These questions are based on the following arrangement. Study it carefully and answer the questions.
$8, H, \%, 3, 7, T, A, 4, \#, 6, B, I, @, R, 1, Q, \star, L, E, 2, K, \,U,5,9$
Four of the following five are alike in a certain way on the basis of their positions in the above arrangement and so form a group. Which is the one that does not belong to the group?

Choose the correct alternative for the missing term in the series: $3F, 6G, 11I, 18L, ?$

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

$6, N,P ,=,@, 7,1 ,\& , R, T, 3, L, ,B, \star, E ,4,\# , 8, G,H ,\$, 5, K,M ,?, 2, D,C$

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?

Choose the correct alternative answer

$bca.....b....aabc....a...caa$

Find the missing term for the given series from the given alternatives:
$BXJ, ETL, HPN, KLP, ?$