If the sequence is A, C, E, G, what is the next letter?

B. H

What comes next in the series: Z, Y, X, W, ?

A. V

In the sequence 3, 6, 11, 18, what is the next number?

A. 25

In a sequence where each letter is followed by the letter that is two places ahead in the alphabet, what letter follows 'G'?

A. I

Identify the missing letter in the sequence: A, C, E, G, __, K.

B. H