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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 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.)

This question was previously asked in
RRB NTPC 2025 Graduate Level CBT 1 Question Paper (25-Mar-2026) (Shift 3)
The correct answer is

RL-SN

To determine which letter-cluster pair does not belong in the group, we compare each option based on their positions in the English alphabet. The pairs need to display a consistent pattern, except for one, which will be the odd one out.

  1. Option 1: RL-SN
    • Position of 'R' in the alphabet: 18
    • Position of 'L' in the alphabet: 12
    • Position of 'S' in the alphabet: 19
    • Position of 'N' in the alphabet: 14
    • Difference: RL (18-12 = 6), SN (19-14 = 5)
  2. Option 2: PJ-QK
    • Position of 'P' in the alphabet: 16
    • Position of 'J' in the alphabet: 10
    • Position of 'Q' in the alphabet: 17
    • Position of 'K' in the alphabet: 11
    • Difference: PJ (16-10 = 6), QK (17-11 = 6)
  3. Option 3: HB-IC
    • Position of 'H' in the alphabet: 8
    • Position of 'B' in the alphabet: 2
    • Position of 'I' in the alphabet: 9
    • Position of 'C' in the alphabet: 3
    • Difference: HB (8-2 = 6), IC (9-3 = 6)
  4. Option 4: FZ-GA
    • Position of 'F' in the alphabet: 6
    • Position of 'Z' in the alphabet: 26
    • Position of 'G' in the alphabet: 7
    • Position of 'A' in the alphabet: 1
    • Difference: FZ (6-26 = -20 or equivalently, 26-6 = 20, considering circular approach), GA (7-1 = 6)

The pairs PJ-QK and HB-IC maintain a consistent difference of 6 between the first and second letters. However, RL-SN, the first pair, does not maintain this pattern as the differences are not equal (6 and 5). Thus, RL-SN is the odd one out.

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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 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.)

  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 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.)

  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 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.)


Important Questions from Classification

  1. In the following question, four number pairs are given. In each pair the number on left side of (-) is related to the number of the right side of (-) with some Logic/Rule/Relation. Three pairs are similar on basis of same Logic/Rule/Relation.
    Select the odd one out from the given alternatives. (NOTE: Operations should be performed on the whole numbers, without breaking down the numbers into its constituent digits. E.g.13 - Operations on 13 such as adding /subtracting /multiplying etc. to 13 can be performed. Breaking down 13 into 1 and 3 and then performing mathematical operations on 1 and 3 is not allowed)

  2. 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.)

  3. Three of the following numbers are alike in a certain way and one is different. Pick the odd one out.

    (NOTE: Operations should be performed on the whole numbers, without breaking down the numbers into their constituent digits. E.g. 13 – Operations on 13 such as adding/deleting/multiplying etc. to 13 can be performed. Breaking down 13 into 1 and 3 and then performing mathematical operations on 1 and 3 is not allowed.)

  4. The following contains two pairs of words which are related to each other in a certain way. Three of the following four word-pairs are alike as these have the same relationship and thus form a group. Which word-pair does NOT belong to that group?
    (The words must be considered as meaningful English words and must not be grouped based on the number of letters/number of consonants/vowels in the word)

  5. Three of the following four options are alike in a certain way and thus form a group. Which is the one that does NOT belong to that group?

    (NOTE: Operations should be performed on the whole numbers, without breaking down the numbers into their constituent digits. E.g., 13 – Operations on 13 such as adding/subtracting/multiplying etc. to 13 can be performed. Breaking down 13 into 1 and 3 and then performing mathematical operations on 1 and 3 is not allowed.)

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