Classification Questions for SSC CHSL, Download Free PDF

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:

1. Words: (e.g., Apple, Banana, Potato, Orange) -> Potato is the odd one (a root/underground vegetable).
2. Numbers/Numerals: (e.g., 8, 27, 64, 100) ->100 is the odd one (not a perfect cube).
3. 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