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Which of the following is the correct code?
OS-NR
IM-HK
LP-KN
FJ-EH
OS-NR
Calculate the difference between the alphabetical positions of the letters in each pair. Three pairs will have the same difference, and the odd one out will have a different value.
Calculate the difference between the alphabetical positions of the letters in each pair. Three pairs will have the same difference, and the odd one out will have a different value.
Analyze Position Differences
Convert letters to positions: O(15), S(19) [diff 4]; N(14), R(18) [diff 4]. Both parts of pair A have a difference of 4.
Check other options
Pair B: I(9), M(13) [diff 4]; H(8), K(11) [diff 3]. Pair C: L(12), P(16) [diff 4]; K(11), N(14) [diff 3]. Pair D: F(6), J(10) [diff 4]; E(5), H(8) [diff 3].
Conclusion
Pair A follows the pattern of having a difference of 4 in both clusters. B, C, and D follow a pattern where the first cluster has a difference of 4 and the second has 3.
B, C, and D are incorrect because they all follow the pattern (diff 4, diff 3), whereas A follows the pattern (diff 4, diff 4).
A is correct because it is the only pair where both letter clusters maintain a consistent alphabetical position difference of 4, unlike the others.
In alphanumeric odd-one-out questions, always map letters to their numerical positions (A=1, B=2...) first; this usually reveals hidden arithmetic patterns.
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