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Select the letter-cluster that can replace the question mark: BDF, HJL, NPR, ?
TVX
TUX
TWZ
TVZ
TVX
Identify the uniform internal +2 gap and the +6 progression of starting letters across clusters.
Identify the uniform internal +2 gap and the +6 progression of starting letters across clusters.
Examine First Letters
The first letters of the clusters are B (2), H (8), and N (14). Each increases by 6 positions (+6). The next first letter is 14 + 6 = 20, which corresponds to T.
Analyze Internal Spacing
Within each cluster, letters advance by +2 steps. BDF is +2, +2; HJL is +2, +2; NPR is +2, +2.
Determine Next Cluster
Starting with T (20), adding +2 gives V (22), and adding another +2 gives X (24). Thus, the missing cluster is TVX.
B: TUX is incorrect because U to X has an invalid step. C: TWZ is incorrect because W to Z has a +3 gap instead of +2. D: TVZ is incorrect because V to Z has a +4 gap instead of +2.
A is correct because the sequence advances through consistent internal +2 letter steps resulting in TVX.
Always check both the jump between consecutive terms and the internal difference within each cluster.