In each triad below, the first letter group changes into the second and then…
2026
In each triad below, the first letter group changes into the second and then into the third according to a fixed rule. Select the option that follows the same rule.
WAIT - AWIT - TIAW
FROM - RFOM - MORF
Answer: C. LONG - OLNG - GNOL — ConceptA letter-transformation rule must act on positions, not on the meaning of the word. Label the four positions of a group as [1, 2, 3, 4], identify the…
- A.
KING - IKNG - INGK
- B.
READ - RAED - DAER
- C.
LONG - OLNG - GNOL
- D.
SONG - OSNG - GONS
Attempted by 23 students.
Show answer & explanation
Correct answer: C
Concept
A letter-transformation rule must act on positions, not on the meaning of the word. Label the four positions of a group as [1, 2, 3, 4], identify the first permutation, and then identify the second permutation.
Application
In both examples, the first change swaps positions 1 and 2 while positions 3 and 4 remain unchanged: [1, 2, 3, 4] becomes [2, 1, 3, 4].
Thus WAIT becomes AWIT, and FROM becomes RFOM.
The second change reads the current letters in the order [4, 3, 1, 2]. Therefore AWIT becomes TIAW, and RFOM becomes MORF.
Applying the same two changes to LONG gives LONG → OLNG → GNOL.
Cross-check and contrast
KING → IKNG swaps the first two letters, but IKNG → INGK uses the order [1, 3, 4, 2].
READ → RAED uses the order [1, 3, 2, 4] in the first change.
SONG → OSNG swaps the first two letters, but OSNG → GONS uses the order [4, 1, 3, 2].
Hence the triad that follows both required permutations is LONG - OLNG - GNOL.