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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.)

The correct answer is
NR - GL

Analyzing Letter Cluster Pairs Alphabetically

The goal is to find the letter-cluster pair that doesn't fit the pattern shared by the other three. The pattern is based on the standard English alphabetical order. The question notes that the pattern isn't related to vowels, consonants, or their positions in that specific sense.

Methodology: Using Alphabetical Positions

To solve this, we'll assign a number to each letter based on its position in the alphabet: A=1, B=2, C=3, ..., Z=26. We'll then look at the differences in these positions:

  • Within each pair (e.g., R to X).
  • Between the pairs (e.g., the first letter of the first pair to the first letter of the second pair).

Step-by-Step Analysis of Options

Option 1: RX - MS

  • Positions: R is 18, X is 24. M is 13, S is 19.
  • Difference within 'RX': $24 - 18 = +6$.
  • Difference within 'MS': $19 - 13 = +6$. (Consistent internal difference)
  • Difference between R and M: $13 - 18 = -5$.
  • Difference between X and S: $19 - 24 = -5$. (Consistent difference between pairs)
  • Observation: Both pairs have a $+6$ difference, and the corresponding letters between pairs have a $-5$ difference.

Option 2: NR - GL

  • Positions: N is 14, R is 18. G is 7, L is 12.
  • Difference within 'NR': $18 - 14 = +4$.
  • Difference within 'GL': $12 - 7 = +5$. (Inconsistent internal difference)
  • Difference between N and G: $7 - 14 = -7$.
  • Difference between R and L: $12 - 18 = -6$. (Inconsistent difference between pairs)
  • Observation: The differences are inconsistent both within the pairs ($+4, +5$) and between the pairs ($-7, -6$).

Option 3: MF - HA

  • Positions: M is 13, F is 6. H is 8, A is 1.
  • Difference within 'MF': $6 - 13 = -7$.
  • Difference within 'HA': $1 - 8 = -7$. (Consistent internal difference)
  • Difference between M and H: $8 - 13 = -5$.
  • Difference between F and A: $1 - 6 = -5$. (Consistent difference between pairs)
  • Observation: Both pairs have a $-7$ difference, and the corresponding letters between pairs have a $-5$ difference. This follows the same structural logic as Option 1.

Option 4: IO - DJ

  • Positions: I is 9, O is 15. D is 4, J is 10.
  • Difference within 'IO': $15 - 9 = +6$.
  • Difference within 'DJ': $10 - 4 = +6$. (Consistent internal difference)
  • Difference between I and D: $4 - 9 = -5$.
  • Difference between O and J: $10 - 15 = -5$. (Consistent difference between pairs)
  • Observation: Both pairs have a $+6$ difference, and the corresponding letters between pairs have a $-5$ difference. This also matches the pattern in Option 1.

Conclusion: Identifying the Odd Pair

We observed a pattern in options 1, 3, and 4:

  • The numerical difference between the letters within the first cluster is the same as the difference within the second cluster.
  • The numerical difference between the first letter of the first cluster and the first letter of the second cluster is the same as the difference between the second letter of each cluster. This difference is consistently $-5$ for options 1, 3, and 4.

Option 2 (NR - GL) breaks this pattern. Its internal differences ($+4$ and $+5$) are not the same, and the differences between corresponding letters ($-7$ and $-6$) are also not the same.

Therefore, NR - GL is the letter-cluster pair that does not belong to the group.

Final Answer

The odd one out is NR - GL.

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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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