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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.)
GC-FH
JF-IL
MI-LN
EA-DF
JF-IL
Calculate the alphabetical positions and check the gap pattern between the letters in each pair. The gap is consistent for three options but distinct for the outlier.
Calculate the alphabetical positions and check the gap pattern between the letters in each pair. The gap is consistent for three options but distinct for the outlier.
Analyze the letter positions
Convert letters to their numerical positions in the English alphabet: A=1, B=2, ..., J=10, ..., Z=26.
Evaluate the pattern per pair
Check the jump between the 1st letter to 2nd, and 3rd to 4th: (A) GC(7,3) тЖТ FH(6,8) | Pattern: 7-4=3, 6+2=8. (B) JF(10,6) тЖТ IL(9,12) | Pattern: 10тИТ4=6, 9+3=12. (C) MI(13,9) тЖТ LN(12,14) | Pattern: 13-4=9, 12+2=14. (D) EA(5,1) тЖТ DF(4,6) | Pattern: 5-4=1, 4+2=6.
Identify the odd one
All pairs (A, C, D) follow the same logic of (First Letter - 4 = Second Letter) and (Third Letter + 2 = Fourth Letter). Option B follows a different pattern (+3) for the second transition.
A: Follows the -4, +2 pattern. C: Follows the -4, +2 pattern. D: Follows the -4, +2 pattern.
B is correct because it is the only pair that does not follow the -4, +2 pattern in its transformation logic, as it follows -4, +3 instead.
When faced with letter-cluster analogies, always map them to numerical values (1-26) immediately; this reveals hidden arithmetic patterns that are otherwise difficult to spot.
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