SSC has scheduled the SSC CHSL 2025 Tier 1 exam for November 12, 2025, and this time you should focus on only the most scoring topics. You know the Reasoning section is your chance to rack up quick, solid marks. Classification is one of the most scoring and important topics that stands out as a genuine score-booster. This topic is simple, highly intuitive, and requires sharp observation skills rather than complex formulas. You can usually expect 2 to 3 questions from Classification, and they are typically easy to moderate. If you miss these, you’re missing out on easy marks that can decide your selection! To help you with that, we have provided this blog in which you will get free topic tests and classification questions for SSC CHSL exam.
What is Reasoning Classification?
Classification questions test your ability to identify the common property or rule shared by a group of items and then select the one item that does not fit the group. You can expect at least 2-3 classification questions in the SSC CHSL Tier 1 exam from easy to moderate level.
It’s literally finding the “Odd One Out.” The items can be:
- Words: (e.g., Apple, Banana, Potato, Orange) -> Potato is the odd one (a root/underground vegetable).
- Numbers/Numerals: (e.g., 8, 27, 64, 100) ->100 is the odd one (not a perfect cube).
- Letters/Alphabets: (e.g., AE, BF, CG, DH) -> The pattern or sequence is the key.
Download Classification Questions for SSC CHSL PDF for Free
Here, we have provided a PDF of Classification Questions for SSC CHSL that you can download for free. Solving these questions will help you boost your reasoning preparation and know the types of questions asked in the exam. This PDF includes the latest pattern-based questions, detailed solutions, and smart-solving tricks to help you master this high-scoring topic.
Question 1: In the following question, select the odd number from the given alternatives.
(NOTE: Operations should be performed on the whole numbers, without breaking down the numbers into its constituent digits. E.g., 32 – Operations on 32 such as adding/ subtracting/ multiplying etc. to 32 can be performed. Breaking down 32 into 3 and 2, and then performing mathematical operations on 3 and 2 is not allowed)
A) 128
B) 256
C) 72
D) 1024
Question 2: Select the letter cluster which does not belong to the same group from the given alternatives.
A) FSOJ
B) XGCB
C) MGCQ
D) WEAS
Question 3: 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)
A) 4736 – 28416
B) 6371 – 38126
C) 9283 – 55698
D) 1824 – 10944
Question 4: 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)
A) 334 – 678
B) 447 – 904
C) 229 – 468
D) 108 – 216
Question 5: In the following question, select the odd letter/letters from the given alternatives.
A) NMKO
B) ZYWA
C) JIGK
D) STPU
Question 6: Select the option in which the numbers shared the same relationship in set as that shared by the numbers in the given set. (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)
(55, 39, 23)
(44, 69, 94)
A) (36, 26, 12)
B) (49, 25, 21)
C) (38, 57, 76)
D) (79, 45, 31)
Question 7: 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. 52 – Operations on 52 such as adding /subtracting /multiplying etc. to 52 can be performed. Breaking down 52 into 5 and 2 and then performing mathematical operations on 5 and 2 is not allowed)
A) 1234 – 7404
B) 8654 – 34616
C) 7854 – 47124
D) 1356 – 8136
Question 8: Four number pairs have been given, out of which three are alike in some manner and one is different. Select the one that is different.
A) (7, 38)
B) (19, 350)
C) (23, 538)
D) (32, 1013)
Question 9: Three of the following words are alike in some manner and hence form a group. Which word 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) .
A) Kelvin
B) Second
C) Meter
D) Dyne
Question 10: Three of the following words are alike in some manner and hence form a group. Which word 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) .
A) Bhutan
B) Myanmar
C) China
D) Vietnam
ANSWER KEYS and SOLUTIONS:
| 1) – 3) | 2) – 4) | 3) – 2) | 4) – 4) | 5) – 4) | 6) – 3) |
| 7) – 2) | 8) – 3) | 9) – 4) | 10) – 4) |
How to Solve Classification Questions Effectively
Forget lengthy solving methods. To attempt Classification questions smartly with speed for the CHSL exam, you need a systematic approach. Here, we have provided a strategy that will help you solve these questions quickly and easily.
1. The Number-Based Checklist (Your Highest Priority)
When you see a group of numbers, check for rules in this specific order. The odd one will usually break one of the top three rules:
- Prime Numbers: Are three numbers prime, and one is composite? (E.g., 17, 19, 23, 27 -> 27 is composite).
- Squares & Cubes: Are three numbers perfect squares or cubes, and the fourth is not? (E.g., 9, 25, 49, 30 -> 30 is not a perfect square).
- Divisibility Rule: Are three divisible by a common factor (like 3, 4, 6, 9), and one is not?
- Sum of Digits: Does the sum of the digits in three numbers match, but differ in the fourth?
2. The Letter-Based Sequence Solver
When letters or letter-groups (like PQRS, STUV, WXYZ) appear, you must think numerically:
- Positional Value is Gold: Immediately convert letters to their numerical positions (A=1, M=13, Z=26). The relationship will become clear (e.g., a difference of +4 between each letter).
- Vowel/Consonant Trick: Check if the group is differentiated by the presence or absence of a vowel. (E.g., BDF, HJL, KLM -> KLM is the odd one out because the other two contain only consonants).
3. The Word-Based Logic Link
This type requires general knowledge, but the link is usually a strict category:
- Check the Strict Category: The common link will be concrete, such as Capital/Currency, State/Animal, Scientific Instrument/Function, or Physical/Abstract Nouns.
- Function/Usage: Three objects may perform a similar function (e.g., cutting tools), while the fourth is a different type of tool entirely.
- Synonym/Antonym: Three words may be synonyms, and the fourth word is their antonym.
Note: Make sure you are practicing it in mock tests and topic tests because, without practice, you will not be able to implement these tricks effectively directly in the exam.
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FAQs: Classification Questions for SSC CHSL
Classification questions test your ability to identify the common link among items and find the one that doesn’t belong — the “odd one out.”
You can expect around 2 to 3 Classification questions in the Tier 1 Reasoning section, generally ranging from easy to moderate difficulty.
Classification questions are simple, logical, and scoring. Missing them means losing easy marks that can impact your overall selection chances.
There are mainly three types — Word-based, Number-based, and Letter-based Classification questions, each testing a different type of reasoning skill.
Check for mathematical patterns such as prime numbers, squares or cubes, divisibility, and sum of digits to identify the odd one out.
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