Fill in the blank space for the given series with the correct alternative.
$1, 6, 13, 22, 33, (...)$

Find the missing letters for the given series from the given alternatives:
$aab....ab....cabcca....bcab....c$

Fill in the blank space for the given series with the correct alternative.
$4, 32, 128, (\ldots)$

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 letters are there in the arrangement,each of which is immediately followed by a symbol?

Choose the correct alternative to fill in the blanks for the series: $a . c a c b c . . . b a c a . . . b$

Fill in the blank space for the given series with the correct alternative.
$563, 647, 479, 815, (...)$