Choose the correct alternative to complete the series: $ccb....c....bbc.....b....cc.....ccbb$

Find out the wrong term from the given series:
$5, 27, 61, 122, 213, 340, 509$

Two terms have been put within brackets. Mark your answer as:
$4, 7, (9), 10, 13, 15, (16), 19$

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

$8 ,H ,\% ,3,7 ,T,A ,4 ,\# ,6 ,B,I ,@ ,R ,1 ,Q ,\star, L,E ,2 ,K ,\$ ,U ,5,9$

How many such symbols are in the above arrangement each of which is immediately followed by a number but not immediately preceded by another number?

Fill in the blank space for the given series with the correct alternative.
$1, 2, 6, 24, (...)$

These questions are based on the following arrangement. Study it carefully and answer the questions.
$J, \star, R, 3, P, L, 2, \#, I, N, 7, O, C, @, K, 5, D, =, M, \$, 6, B, >, A, Q, 4$
What will come in place of the question mark in the following series based on the above arrangement?
$PRJ, \# L3, 7I2, @ON, ?$