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Select the term from among the given options that can replace the question mark (?) in the following series. PKI 23, MHF 31, JEC 47, GBZ 79, DYW 143, ?
AVT 271
AVT 270
UVT 271
AYT 271
AVT 271
Analyze letters and numbers separately. First letter: -3, Second: -3, Third: -3 (cycling backwards). Number sequence: Difference between terms doubles and adds 1 or 2, specifically: (Next Diff) = (Prev Diff * 2) + 1, + 3, + 5, + 7.
Analyze letters and numbers separately. First letter: -3, Second: -3, Third: -3 (cycling backwards). Number sequence: Difference between terms doubles and adds 1 or 2, specifically: (Next Diff) = (Prev Diff * 2) + 1, + 3, + 5, + 7.
Letter Transformation
Each of the three letters in the term follows a -3 alphabetical shift pattern: P-M-J-G-D тЖТ A; K-H-E-B-Y тЖТ V; I-F-C-Z-W тЖТ T. Resulting letters: AVT.
Number Sequence Analysis
The numbers follow a doubling difference pattern: 31-23=8, 47-31=16, 79-47=32, 143-79=64. The next difference must be 64*2 = 128. Adding 128 to 143 yields 271.
B: Incorrect number (270). C: Incorrect first letter (U instead of A). D: Incorrect middle letter (Y instead of V).
A is correct because the series follows a consistent -3 letter shift for all positions and a doubling difference pattern (+8, +16, +32, +64, +128) for the numbers.
In alphanumeric series, always split the pattern into sub-components (letters vs numbers) immediately; most SSC/Banking exams use basic arithmetic progressions or geometric growth for numbers.
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