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Based on the English alphabetical order, three of the following four letter-cluster pairs are alike in a certain way. Which pair DOES NOT belong to that group?
AD - EH
CF - GJ
IL - MP
RU - VX
RU - VX
Calculate the difference between the alphabetical positions of letters in each pair; three pairs will share the same gap patterns, while one will differ.
Calculate the difference between the alphabetical positions of letters in each pair; three pairs will share the same gap patterns, while one will differ.
Analyze positional difference for each pair
AD: A=1, D=4 (Gap +3). EH: E=5, H=8 (Gap +3). Both pairs follow a +3, +4, +3 pattern between letters.
Evaluate remaining pairs
CF: C=3, F=6 (Gap +3). GJ: G=7, J=10 (Gap +3). IL: I=9, L=12 (Gap +3). MP: M=13, P=16 (Gap +3). RU: R=18, U=21 (Gap +3). VX: V=22, X=24 (Gap +2).
Identify the anomaly
Pairs AD-EH, CF-GJ, and IL-MP follow the rule where both letter-clusters consist of letters separated by 3. RU-VX violates this because V to X is only a separation of 2.
A: Follows the +3 gap rule for both clusters, B: Follows the +3 gap rule for both clusters, C: Follows the +3 gap rule for both clusters.
D is correct because the pair RU-VX is the only one where the second cluster letters (V and X) have a gap of 2, whereas all other options consist of pairs where the letters have a consistent gap of 3.
Always assign numerical values to letters (A=1, B=2... Z=26) immediately upon seeing letter-analogy questions to spot arithmetic patterns instantly.