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Question

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.)

This question was previously asked in
RRB NTPC 2024 Undergraduate CBT 1 Question Paper (29-Aug-2025) (Shift 1)
The correct answer is

UM - GZ

Alphabetical Order Analysis of Letter Clusters

This question asks us to identify a pair of letter clusters that is different from the others, based on a specific relationship derived from the English alphabetical order. We need to examine the relationship between the letters within each pair and between the two clusters in each option.

First, let's assign numerical positions to each letter based on its place in the alphabet (A=1, B=2, ..., Z=26).

Letter Cluster Comparison

Let's analyze each option:

Option 1: SK - PH

  • S is the 19th letter. K is the 11th letter.
  • P is the 16th letter. H is the 8th letter.
  • Relationship between S and P: Position of P = Position of S + (\(16 - 19\)) = Position of S + (\(-3\)).
  • Relationship between K and H: Position of H = Position of K + (\(8 - 11\)) = Position of K + (\(-3\)).
  • In this pair, both letters in the first cluster (SK) are shifted back by 3 positions to get the letters in the second cluster (PH).

Option 2: FX - CU

  • F is the 6th letter. X is the 24th letter.
  • C is the 3rd letter. U is the 21st letter.
  • Relationship between F and C: Position of C = Position of F + (\(3 - 6\)) = Position of F + (\(-3\)).
  • Relationship between X and U: Position of U = Position of X + (\(21 - 24\)) = Position of X + (\(-3\)).
  • This pair also follows the pattern of shifting back by 3 positions.

Option 3: ME - JB

  • M is the 13th letter. E is the 5th letter.
  • J is the 10th letter. B is the 2nd letter.
  • Relationship between M and J: Position of J = Position of M + (\(10 - 13\)) = Position of M + (\(-3\)).
  • Relationship between E and B: Position of B = Position of E + (\(2 - 5\)) = Position of E + (\(-3\)).
  • This pair also follows the pattern of shifting back by 3 positions.

Option 4: UM - GZ

  • U is the 21st letter. M is the 13th letter.
  • G is the 7th letter. Z is the 26th letter.
  • Relationship between U and G: Position of G = Position of U + (\(7 - 21\)) = Position of U + (\(-14\)).
  • Relationship between M and Z: Position of Z = Position of M + (\(26 - 13\)) = Position of M + (\(+13\)).
  • In this pair, the letters do not shift back by 3 positions. The first letter shifts back by 14, and the second letter shifts forward by 13.

Identifying the Odd Pair

Three pairs (SK-PH, FX-CU, ME-JB) share a common pattern where each letter in the first cluster is shifted back by 3 positions in the alphabet to obtain the corresponding letter in the second cluster. The pair UM - GZ does not follow this specific pattern.

Therefore, the pair that does not belong to the group is UM - GZ.

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Similar Questions

  1. 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.)

  2. 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.)

  3. 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.)

  4. 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.)

  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 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.)

  6. 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.)

  7. 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.)

  8. 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.)

  9. 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 letter-cluster 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.)
  10. 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.)

Important Questions from Classification

  1. Directions for the following 3 (three) items : consider the given information and answer the three items that follow. 

    A, B, C, D, E, F and G are Lecturers from different cities—Hyderabad, Delhi, Shillong, Kanpur, Chennai, Mumbai and Srinagar (not necessarily in the same order) who participated in a conference. Each one of them is specialized in a different subject, viz., Economics, Commerce, History, Sociology, Geography, Mathematics and Statistics (not necessarily in the same order). 

    Further 1. Lecturer from Kanpur is specialized in Geography 

    2. Lecturer D is from Shillong 

    3. Lecturer C from Delhi is specialized in Sociology 

    4. Lecturer B is specialized in neither History nor Mathematics 

    5. Lecturer A who is specialized in Economics does not belong to Hyderabad 

    6. Lecturer F who is specialized in Commerce belongs to Srinagar 

    7. Lecturer G who is specialized in Statistics belongs to Chennai 

    Who is specialized in Geography?

  2. A, B, C, D, E, F and G are Lecturers from different cities—Hyderabad, Delhi, Shillong, Kanpur, Chennai, Mumbai and Srinagar (not necessarily in the same order) who participated in a conference. Each one of them is specialized in a different subject, viz., Economics, Commerce, History, Sociology, Geography, Mathematics and Statistics (not necessarily in the same order). 

    Further 1. Lecturer from Kanpur is specialized in Geography 

    2. Lecturer D is from Shillong 

    3. Lecturer C from Delhi is specialized in Sociology 

    4. Lecturer B is specialized in neither History nor Mathematics 

    5. Lecturer A who is specialized in Economics does not belong to Hyderabad 

    6. Lecturer F who is specialized in Commerce belongs to Srinagar 

    7. Lecturer G who is specialized in Statistics belongs to Chennai 

    To which city does the Lecturer specialized in Economics belong?

  3. A, B, C, D, E, F and G are Lecturers from different cities—Hyderabad, Delhi, Shillong, Kanpur, Chennai, Mumbai and Srinagar (not necessarily in the same order) who participated in a conference. Each one of them is specialized in a different subject, viz., Economics, Commerce, History, Sociology, Geography, Mathematics and Statistics (not necessarily in the same order). 

    Further 1. Lecturer from Kanpur is specialized in Geography 

    2. Lecturer D is from Shillong 

    3. Lecturer C from Delhi is specialized in Sociology 

    4. Lecturer B is specialized in neither History nor Mathematics 

    5. Lecturer A who is specialized in Economics does not belong to Hyderabad 

    6. Lecturer F who is specialized in Commerce belongs to Srinagar 

    7. Lecturer G who is specialized in Statistics belongs to Chennai 

    Who of the following belongs to Hyderabad?

  4. In a school, there are five teachers A, B, C, D and E. A and B teach Hindi and English. C and B teach English and Geography. D and A teach Mathematics and Hindi. E and B teach History and French. Who teaches maximum numb, of subjects?

  5. How many triangles are there in the given figure?

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