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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 is the one that does not belong to that group? 

(Note: The odd man out is not based on the number of consonants/vowels or their position in the letter-cluster.)

The correct answer is
EI−IP

Identifying the Odd Letter Cluster Pair

The question asks us to find the letter-cluster pair that does not follow the same logical pattern as the others, based on the English alphabetical order. We need to analyze the relationship between the letters within each pair and between the two parts of each cluster.

Let's assign numerical positions to the letters (A=1, B=2, ..., Z=26).

Analyzing the Letter Cluster Pairs

We will examine each pair based on the following potential pattern observed in the majority:

  • The difference between the alphabetical positions of the second and first letters in the first cluster (e.g., Y - X in XY) is 4.
  • The difference between the alphabetical positions of the second and first letters in the second cluster (e.g., W - Z in ZW) is 4.
  • The difference between the alphabetical positions of the first letter of the second cluster and the first letter of the first cluster (e.g., Z - X) is 5.
  • The difference between the alphabetical positions of the second letter of the second cluster and the second letter of the first cluster (e.g., W - Y) is 5.

We must use modular arithmetic (wrapping around the alphabet from Z to A) when calculating differences.

Pair 1: RV−WA

  • R=18, V=22. The difference $V - R = 22 - 18 = 4$.
  • W=23, A=1. The difference $A - W = (1 + 26) - 23 = 4$.
  • The shift from R to W is $W - R = 23 - 18 = 5$.
  • The shift from V to A is $A - V = (1 + 26) - 22 = 5$.
  • This pair follows the pattern.

Pair 2: PT−UY

  • P=16, T=20. The difference $T - P = 20 - 16 = 4$.
  • U=21, Y=25. The difference $Y - U = 25 - 21 = 4$.
  • The shift from P to U is $U - P = 21 - 16 = 5$.
  • The shift from T to Y is $Y - T = 25 - 20 = 5$.
  • This pair follows the pattern.

Pair 3: GK−LP

  • G=7, K=11. The difference $K - G = 11 - 7 = 4$.
  • L=12, P=16. The difference $P - L = 16 - 12 = 4$.
  • The shift from G to L is $L - G = 12 - 7 = 5$.
  • The shift from K to P is $P - K = 16 - 11 = 5$.
  • This pair follows the pattern.

Pair 4: EI−IP

  • E=5, I=9. The difference $I - E = 9 - 5 = 4$. (Matches)
  • I=9, P=16. The difference $P - I = 16 - 9 = 7$. (Does not match the required difference of 4)
  • The shift from E to I is $I - E = 9 - 5 = 4$. (Does not match the required shift of 5)
  • The shift from I to P is $P - I = 16 - 9 = 7$. (Does not match the required shift of 5)
  • This pair does not follow the established pattern.

Conclusion

The letter-cluster pair EI−IP is the odd one out because it does not adhere to the consistent pattern of internal differences (+4) and inter-cluster shifts (+5) observed in the other three pairs (RV−WA, PT−UY, GK−LP).

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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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