Based on the English alphabetical order, three of the following four…
2026
Based on the English alphabetical order, three of the following four letter-cluster pairs are alike in a certain way and thus form a group. Which is the one that DOES NOT belong to that group?
Note: The odd one out is not based on the number of consonants/vowels or their position in the letter-cluster.
Answer: C. YR - EV — ConceptRepresent each English letter by its alphabetical position: A = 1, B = 2, ..., Z = 26. A letter-pair transformation is uniform when the same forward…
- A.
UP - AU
- B.
TC - ZH
- C.
YR - EV
- D.
AN - GS
Attempted by 26 students.
Show answer & explanation
Correct answer: C
Concept
Represent each English letter by its alphabetical position: A = 1, B = 2, ..., Z = 26.
A letter-pair transformation is uniform when the same forward cyclic shifts are applied to corresponding letters; after Z, counting continues from A.
Application
UP → AU: U + 6 = A after wrap-around, and P + 5 = U. The shift pair is (+6, +5).
TC → ZH: T + 6 = Z, and C + 5 = H. The shift pair is (+6, +5).
YR → EV: Y + 6 = E after wrap-around, and R + 4 = V. The shift pair is (+6, +4).
AN → GS: A + 6 = G, and N + 5 = S. The shift pair is (+6, +5).
Cross-check and contrast
Reverse the common transformation by subtracting 6 from the first output letter and 5 from the second output letter.
AU reverses to UP.
ZH reverses to TC.
GS reverses to AN.
EV reverses to YQ, not YR; R would become W under a +5 shift.
Therefore, YR - EV is the pair that does not belong to the group.