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Question

Find the odd one out:

This question was previously asked in
SSC CGL 2025 Tier 2 Paper 1 Question Paper (19-Jan-2026)
The correct answer is
$2 + 2 = 5$

Odd One Out Analysis

The task is to identify the equation that does not follow the pattern of the others. We need to evaluate each mathematical statement provided.

Equation Evaluation

  • Option 1: $3 + 4 = 7$. This statement is mathematically correct.
  • Option 2: $5 + 6 = 11$. This statement is mathematically correct.
  • Option 3: $2 + 2 = 5$. This statement is mathematically incorrect, as $2 + 2$ equals $4$, not $5$.
  • Option 4: $8 + 1 = 9$. This statement is mathematically correct.

Identifying the Incorrect Equation

Options 1, 2, and 4 present correct addition facts. Option 3 presents an incorrect addition fact ($2+2 \neq 5$). Therefore, the incorrect mathematical statement is the odd one out.

Conclusion

The odd one out is the incorrect mathematical statement, which is Option 3: $2 + 2 = 5$.

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Important Questions from Classification

  1. 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.)

  2. 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.)

  3. 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)

  4. 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.)

  5. 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)

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