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Question

Based on the English alphabetical order, three of the following four letter-clusters are alike in a certain way and thus form a group. Which letter-cluster 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.)

The correct answer is
YTW

Analyzing Letter Cluster Patterns

The goal is to identify which letter cluster does not follow the same alphabetical relationship pattern as the others. We need to examine the sequence and spacing of letters within each cluster based on the English alphabet.

Alphabetical Positions and Differences

First, let's determine the numerical position of each letter in the English alphabet (A=1, B=2, ..., Z=26) and calculate the difference between consecutive letter positions.

Cluster Letter 1 Position ($P_1$) Letter 2 Position ($P_2$) Letter 3 Position ($P_3$) $P_2 - P_1$ $P_3 - P_2$
YTW Y(25) T(20) W(23) $20 - 25 = -5$ $23 - 20 = +3$
EHF E(5) H(8) F(6) $8 - 5 = +3$ $6 - 8 = -2$
JMK J(10) M(13) K(11) $13 - 10 = +3$ $11 - 13 = -2$
ILJ I(9) L(12) J(10) $12 - 9 = +3$ $10 - 12 = -2$

Identifying the Unique Cluster

By analyzing the differences, we observe a consistent pattern in three of the clusters:

  • EHF: The second letter (H) is 3 positions after the first (E), and the third letter (F) is 2 positions before the second (H). The difference sequence is ($+3, -2$).
  • JMK: The second letter (M) is 3 positions after the first (J), and the third letter (K) is 2 positions before the second (M). The difference sequence is ($+3, -2$).
  • ILJ: The second letter (L) is 3 positions after the first (I), and the third letter (J) is 2 positions before the second (L). The difference sequence is ($+3, -2$).

The cluster YTW does not follow this pattern. The differences are $-5$ (T from Y) and $+3$ (W from T).

Conclusion: The Odd Cluster

Since YTW exhibits a different relationship between its letters compared to EHF, JMK, and ILJ, it is the cluster that does not belong to the group.

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Important Questions from Classification (Notes)

  1. Find the odd one out
  2. Find the odd one out:
  3. Based on the English alphabetical order, three of the following four are alike in a certain way and thus form a group. Which is the one that 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.)
  4. Based on the alphabetical order, three of the following four are alike in a certain way and thus form a group. Which one does not belong to that group?
    (Note: The odd one out is not based on the number of consonants or vowels or their position in the letter cluster)
  5. 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 is the one that 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.)
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