Fill in the blank space for the given series with the correct alternative.
$1, 2, 5, 12, 27, 58, 121, (\ldots)$

Choose the correct alternative for the missing term:
$A, C, F, H, ?, M$

Study carefully the following arrangement of letters,digits,and symbols to answer the question:
$M, 7, \&, 8, L, P, @, Q, N, \beta, T, Y, 3, 2, =, E, 4, 9, \#, G, H, 5$
How many such letters are there in the arrangement,each of which is immediately followed by a number?

Which term comes next in the sequence: $nd, iy, dt, yo, tj, ?$

Fill in the blank space for the given series with the correct alternative.
$2, 3, 5, 7, 11, (\ldots), 17$

Choose the correct alternative for the missing terms in the series: $W, V, T, S, Q, P, N, M, ?, ?$