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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 pair 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.)
RM-OT
LG-IM
JE-GK
SN-PT
RM-OT
Calculate the difference between the alphabetical positions of letters in each pair. The pair with a different gap or logical consistency than the others is the answer.
Calculate the difference between the alphabetical positions of letters in each pair. The pair with a different gap or logical consistency than the others is the answer.
Analyze RM-OT
R is 18, M is 13 (Difference = -5). O is 15, T is 20 (Difference = +5).
Analyze LG-IM
L is 12, G is 7 (Difference = -5). I is 9, M is 13 (Difference = +4).
Analyze JE-GK
J is 10, E is 5 (Difference = -5). G is 7, K is 11 (Difference = +4).
Analyze SN-PT
S is 19, N is 14 (Difference = -5). P is 16, T is 20 (Difference = +4).
B: Follows the -5, +4 pattern. C: Follows the -5, +4 pattern. D: Follows the -5, +4 pattern.
A is correct because RM-OT follows a pattern of -5, +5, whereas all other options follow the pattern of -5, +4.
In letter-cluster reasoning, always write down the numerical position of letters (A=1, B=2...) to quickly spot consistent arithmetic differences.
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