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Select the triad which follows the same pattern as that followed by the two triads given below. Both triads follow the same pattern. JH-KI-LNLJ-MK-NP
RP-SQ-TU
QO-RP-ST
OM-PN-QS
SQ-TR-UV
OM-PN-QS
Identify the internal logic of each triad: the first two letters have a gap of 2 (e.g., J+1=K, H+1=I), and the second to third letter pair has a specific shift (e.g., K-I=+2, I-N=-5, or simpler: analyze the sequence across the whole triad).
Identify the internal logic of each triad: the first two letters have a gap of 2 (e.g., J+1=K, H+1=I), and the second to third letter pair has a specific shift (e.g., K-I=+2, I-N=-5, or simpler: analyze the sequence across the whole triad).
Analyze the given sequence
Look at the triad JH-KI-LN: J to K (+1), H to I (+1). Then KI to LN: K to L (+1), I to N (+5). Let's look at the second example LJ-MK-NP: L to M (+1), J to K (+1). Then MK to NP: M to N (+1), K to P (+5). The pattern is: (X, Y) тЖТ (X+1, Y+1) тЖТ (X+2, Y+5).
Apply pattern to options
Triad 1: (J,H) + (1,1) = (K,I). (K,I) + (1,5) = (L,N). Triad 2: (L,J) + (1,1) = (M,K). (M,K) + (1,5) = (N,P). We look for an option that follows (X,Y) тЖТ (X+1, Y+1) тЖТ (X+2, Y+5). Checking OM-PN-QS: (O,M) тЖТ (O+1, M+1) = (P,N). (P,N) тЖТ (P+1, N+5) = (Q,S). This matches!
A: RP-SQ-TU does not follow the (+1,+1) then (+1,+5) rule. B: QO-RP-ST does not follow the rule. D: SQ-TR-UV does not follow the rule.
C is correct because the sequence follows a consistent shift of +1 to each letter in the first transformation, and a shift of +1 and +5 respectively in the second transformation (OM тЖТ PN тЖТ QS).
In letter triad problems, always break the triad into segments (1st-2nd, 2nd-3rd) and compare positional differences (A=1, B=2, etc.) to identify the hidden arithmetic progression.
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