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What should come in place of the '?' in the series: AZ, BY, CX, DW, ?
EV
EU
FU
FV
EV
The series follows two simultaneous simple patterns: the first letter shifts forward (A, B, C, D → E) and the second letter shifts backward (Z, Y, X, W → V) in the alphabet.
The series follows two simultaneous simple patterns: the first letter shifts forward (A, B, C, D → E) and the second letter shifts backward (Z, Y, X, W → V) in the alphabet.
Analyze the first letter of each term
The first letters of the terms are A, B, C, D. This is a simple sequence advancing by +1 position in the English alphabet. Therefore, the next letter after D is E.
Analyze the second letter of each term
The second letters of the terms are Z, Y, X, W. This is a sequence moving backward by -1 position in the English alphabet. Therefore, the next letter before W is V.
Combine the results
Combining the next first letter (E) and the next second letter (V) results in the term EV.
B: EU is incorrect because the second letter must be V, not U. C: FU is incorrect because the first letter must be E, not F, and the second letter is wrong. D: FV is incorrect because the first letter must be E, not F.
A is correct because the first letters follow the forward sequence (A, B, C, D, E) and the second letters follow the reverse alphabetical sequence (Z, Y, X, W, V).
For letter series, always write the A-Z sequence or their numerical positions (1-26) to instantly spot increments or decrements without confusion.
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