What terms will fill in the blank spaces?
$Y, W, U, S, Q, (...), (...)$

Fill in the blank space for the given series with the correct alternative.
Which term of the series $5, 10, 20, 40, \ldots$ is $1280$?

Two terms have been put within brackets. Mark your answer as:
$2, 3, (6), 11, 18, (30), 38$

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 complete the series: $...aaba...bba...bba....abaa....b$

Choose the correct alternative for the missing term in the series: $shg, rif, qie, pkd, ?$