Discussion
The terms alternate between the two ends of the alphabet, converging on the middle. What comes next?
A, Z, C, X, E, ?
Answer: C
Correct answer: V
The terms alternate between the two ends of the alphabet. The odd-position terms run A, C, E, climbing two at a time; the even-position terms run Z, X, falling two at a time. The next belongs to the descending strand, and two below X(24) is position 22, which is V. W at 23 is a single backward step and is what a reader who has not separated the strands will choose. The two strands converge on the middle of the alphabet, so the series can run for at most thirteen terms before they meet.
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