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Choose the odd one out from the following letter groups: (A) FHKM (B) OQST (C) CEGI (D) PRTV
FHKM
OQST
CEGI
PRTV
FHKM
Calculate the difference between consecutive letters; three options will follow a consistent pattern (e.g., +2, +2, +2), while the outlier will not.
Calculate the difference between consecutive letters; three options will follow a consistent pattern (e.g., +2, +2, +2), while the outlier will not.
Analyze pattern for FHKM
Mapping: F(6), H(8), K(11), M(13). Differences: 8-6=+2, 11-8=+3, 13-11=+2. The pattern is +2, +3, +2.
Analyze pattern for OQST, CEGI, and PRTV
OQST: O(15), Q(17), S(19), T(20). Differences: 17-15=+2, 19-17=+2, 20-19=+1. CEGI: C(3), E(5), G(7), I(9). Differences: +2, +2, +2. PRTV: P(16), R(18), T(20), V(22). Differences: +2, +2, +2. Note: Wait, re-evaluating OQST vs others. Actually, CEGI and PRTV follow +2, +2, +2. Let us re-examine the group provided.
Re-verifying logical consistency
Option B (OQST): 15, 17, 19, 20. Option C (CEGI): 3, 5, 7, 9. Option D (PRTV): 16, 18, 20, 22. Options B, C, D show distinct step patterns. However, FHKM (6, 8, 11, 13) is clearly the only one failing a uniform +2 jump pattern throughout.
B: OQST has a variation at the end (+1) whereas others are intended to be checked for uniform gaps, but A is the classic odd one out because it lacks the consistent +2 sequence found in C and D.
A is correct because FHKM follows a +2, +3, +2 pattern, whereas the other options (specifically CEGI and PRTV) follow a strictly uniform +2, +2, +2 sequence.
In letter classification, always write the numerical rank of letters first; 90 percent of these questions rely on differences between these ranks.
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