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Question

Four letter-clusters have been given, out of which three are alike in some manner and one is different. Select the odd letter-cluster.

This question was previously asked in
SSC CGL 2023 (Tier-II) Paper 1 Previous Year Paper (26-Oct-2023) (Shift-1)
The correct answer is

MOQX

Solving Letter Cluster Reasoning Problems

In this type of reasoning question, we are given a set of letter clusters, and we need to identify the one that does not follow the same pattern as the others. To solve this, we usually look at the positions of the letters in the English alphabet and find the relationship or pattern between them within each cluster.

Analyzing the Given Letter Clusters

Let's list the numerical positions of the letters in each cluster:

  • EILN: E is the 5th letter, I is the 9th, L is the 12th, N is the 14th.
  • AEHJ: A is the 1st letter, E is the 5th, H is the 8th, J is the 10th.
  • MOQX: M is the 13th letter, O is the 15th, Q is the 17th, X is the 24th.
  • RVYA: R is the 18th letter, V is the 22nd, Y is the 25th, A is the 1st (or 27th if considering wrap-around from Z).

Calculating Differences Between Letter Positions

Now, let's find the difference in alphabetical position between consecutive letters within each cluster:

Letter Cluster Letter Positions Differences Pattern
EILN 5, 9, 12, 14 9 - 5 = 4, 12 - 9 = 3, 14 - 12 = 2 +4, +3, +2
AEHJ 1, 5, 8, 10 5 - 1 = 4, 8 - 5 = 3, 10 - 8 = 2 +4, +3, +2
MOQX 13, 15, 17, 24 15 - 13 = 2, 17 - 15 = 2, 24 - 17 = 7 +2, +2, +7
RVYA 18, 22, 25, 27 (A after Z) 22 - 18 = 4, 25 - 22 = 3, 27 - 25 = 2 +4, +3, +2

Identifying the Odd Letter Cluster Pattern

Looking at the patterns of differences:

  • EILN shows a pattern of adding 4, then 3, then 2 to the position of the previous letter.
  • AEHJ shows a pattern of adding 4, then 3, then 2 to the position of the previous letter.
  • MOQX shows a pattern of adding 2, then 2, then 7 to the position of the previous letter.
  • RVYA shows a pattern of adding 4, then 3, then 2 to the position of the previous letter (considering A as 27 after Z).

Three of the letter clusters (EILN, AEHJ, and RVYA) follow the same pattern of differences (+4, +3, +2). The letter cluster MOQX follows a different pattern of differences (+2, +2, +7).

Conclusion: Selecting the Odd Letter Cluster

Based on the analysis of the patterns within each letter cluster, MOQX is the one that is different from the others because the differences between consecutive letter positions do not follow the same +4, +3, +2 sequence found in EILN, AEHJ, and RVYA.

Revision Table: Letter Cluster Patterns

Cluster Letter Positions Pattern (Differences)
EILN 5, 9, 12, 14 +4, +3, +2
AEHJ 1, 5, 8, 10 +4, +3, +2
MOQX 13, 15, 17, 24 +2, +2, +7
RVYA 18, 22, 25, 27 +4, +3, +2

Additional Information: Letter Series Reasoning

Letter series and letter cluster reasoning are common types of questions in logical reasoning. They test your ability to identify patterns based on the alphabetical order and positions of letters. Here are some common patterns to look for:

  • Alphabetical Position: The numerical position of each letter (A=1, B=2, ... Z=26).
  • Differences/Sums: Consistent differences or sums between consecutive letters' positions.
  • Alternating Patterns: Patterns that alternate between different rules.
  • Skip Letter Patterns: Skipping a fixed number of letters between consecutive letters.
  • Vowel/Consonant Patterns: Patterns based on whether letters are vowels or consonants.
  • Reverse Alphabetical Order: Considering the alphabet backwards (Z=1, Y=2, ... A=26).

Solving these questions requires practice and familiarity with the English alphabet's structure and positions.

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Important Questions from Letter based

  1. Identify the odd one from the following.

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