Reasoning - Odd One Out: 18 MCQs with Answers

Reasoning- Odd One Out

Odd One Out Reasoning Questions with Answers

Every reasoning paper hides a few marks in plain sight. Odd One Out is one of them. You are handed four or five items — words, numbers, letter pairs, sometimes shapes — and asked to point out the one that does not belong with the rest. No formula. No calculation. Just the ability to notice what everyone else shares.

Examiners love this topic because it takes ten seconds to read and can be solved in fifteen. Students often lose it anyway, because they hunt for the odd item instead of first finding the common thread. That single habit is what this quiz is built to fix.

What Does Odd One Out Mean in Reasoning?

Odd One Out, also called Classification or Odd Man Out, tests whether you can group things by a shared property. Four options follow one rule. The fifth breaks it. Your job is to name the rule silently in your head, then check which option refuses to fit.

Take a simple set: Rose, Lotus, Lily, Mango. Three are flowers, one is a fruit. The answer is Mango.

Now a harder one: 121, 144, 169, 180. The first three are perfect squares — 11², 12², 13². The number 180 is not. Same logic, different dress.

Boards write the topic under different names in their syllabus PDFs. The Haryana Staff Selection Commission lists it as Classification in the CET reasoning section. Banking papers usually call it Odd Man Out. Railway papers sometimes fold it into Analogy and Classification. The question stays the same.

Types of Odd One Out Questions You Will Face

Word Classification

Fruits, flowers, birds, professions, states, capitals, musical instruments. The trap is usually a near-miss — Tomato slipped into a list of vegetables, or Whale placed among fish.

Number Classification

Prime numbers, perfect squares, cubes, multiples, numbers divisible by a common factor. Check divisibility first, then squares, then cubes. That order saves time.

Letter and Alphabet Classification

Groups like BD, FH, JL, MP. Count the gaps between letters. Three pairs skip one letter; one does not.

General Knowledge Based Classification

Rivers, dance forms, freedom fighters, currencies. Reasoning meets GK here, which is why state-level exams use it so freely — a Rajasthan paper may drop four folk dances and one from outside the state.

Non-Verbal Classification

Figures, mirror images, rotated shapes. Common in police, SSC and defence papers. Count sides, count enclosed spaces, check symmetry.

How to Solve Odd One Out Questions Quickly

1. Read all options before deciding. The answer is decided by the group, not by any single item.
2. Name the common rule out loud in your mind. "All are metals." "All are perfect squares." If you cannot name it, you have not found it yet.
3. Test the obvious property first — category, divisibility, spelling pattern, letter gap.
4. Move to the second layer if the first fails. Vegetables that grow underground versus above. Even numbers that are also cubes.
5. Accept the strongest rule, not the cleverest one. Any set can be twisted to make a second answer look right. Examiners reward the simplest valid grouping.
6. Cap your time at 20 seconds. Mark it and return later. A stuck classification question is not worth a solved arithmetic question.

One warning worth repeating: negative marking punishes creativity here. If two answers seem defensible, pick the one a school textbook would agree with.

Which Competitive Exams Ask Odd One Out Questions?

National-Level Exams

Exam Body	Exams
SSC	CGL, CHSL, MTS, GD Constable, CPO, Stenographer, Selection Post
Railways (RRB)	NTPC, Group D, ALP, JE, RPF Constable & SI
Banking & Insurance	IBPS PO, IBPS Clerk, IBPS RRB, SBI PO, SBI Clerk, RBI Assistant, LIC AAO/ADO, NIACL
Defence	NDA, CDS, AFCAT, Indian Coast Guard, Agniveer (Army/Navy/Air Force)
Teaching & Others	CTET, UGC NET Paper 1, CUET, NRA CET, various PSU exams

State-Level Exams

• Haryana — HSSC CET (Group C and Group D), Haryana Police Constable and Sub-Inspector, HSSC Clerk and Patwari posts, HTET, HPSC prelims screening tests.
• Rajasthan — RSSB/RSMSSB CET (Graduate and Senior Secondary level), Rajasthan Police Constable, Patwari, Gram Sevak, VDO, Rajasthan Computor, RPSC RAS screening.
• Uttar Pradesh — UPSSSC PET, UP Police Constable and SI, UP Lekhpal, UPPSC prelims, UPSSSC Junior Assistant, UPTET.
• Delhi — DSSSB (PRT, TGT, Junior Assistant, Patwari, Grade IV DASS), Delhi Police Constable and Head Constable, DDA recruitment exams.
• Bihar — BSSC Inter Level and Graduate Level CGL, CSBC Bihar Police Constable, Bihar Daroga (SI), Bihar Excise Constable, BPSC screening papers.
• Jharkhand — JSSC CGL (JGGLCCE), JSSC Excise Constable, JSSC Panchayat Secretary, Jharkhand Police Constable, JPSC prelims.
• Himachal Pradesh — HP Rajya Chayan Aayog (the body that replaced the disbanded HPSSC Hamirpur) exams such as JOA-IT and Clerk, HP Police Constable, HPPSC HPAS prelims.
• Chandigarh — Chandigarh Police Constable, UT Chandigarh Group C posts, Chandigarh JBT and clerk recruitment.
• Punjab — PSSSB Clerk, VDO and Excise Inspector, Punjab Police Constable and SI, PPSC prelims, Punjab Patwari.
• Also useful for — Madhya Pradesh (MPPEB/ESB), Uttarakhand (UKSSSC), Chhattisgarh (CGPSC/Vyapam), Maharashtra (MPSC), Gujarat (GPSSB) and most other state subordinate service boards.

Anyone preparing for a state CET gets extra value here. Because CET papers keep no negative marking in several states and run on a tight clock, fast topics like classification decide the cut-off more than hard topics do.

Why Practise Odd One Out on This Quiz

• Questions are arranged from easy to exam-level, so beginners are not thrown into the deep end.
• Every answer carries a one-line reason, not just a letter.
• Word, number, letter and GK-based sets are mixed, exactly as real papers do it.
• Attempt it as many times as you like. No sign-up wall.
• Works on a phone, which matters when your practice happens on a bus or between classes.

A Quick Self-Check Before You Start

Try these three. Answers sit at the end of the quiz.

1. Copper, Iron, Mercury, Zinc
2. 27, 64, 100, 125
3. Chandigarh, Shimla, Jaipur, Kanpur

If you spotted why Mercury, 100 and Kanpur stand apart, you are ready for the timed set below.

Summary

Odd One Out rewards pattern recognition, not memorisation. Find the rule that binds the majority, and the exception announces itself. Practise mixed sets daily for two weeks, keep a note of every question you got wrong, and this becomes one of the fastest-scoring areas in your reasoning section — whether you sit for SSC CGL in Delhi, CET in Haryana or Rajasthan, PET in Uttar Pradesh, or a constable paper in Bihar, Punjab or Himachal.

Other Important Links:

• Psychology Practice Set
• Haryana GK Practice Set
• Hindi Grammar Practice Set
• English Grammar Practice Set
• Reasoning Practice Set
• Mathematics Practice Set

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Frequently Asked Questions

What is Odd One Out in reasoning?

Odd One Out is a classification-based reasoning question where four or five items share a common property and one does not. The candidate has to identify the item that breaks the pattern. It is also called Odd Man Out or Classification in exam syllabi.

Is Odd One Out the same as Classification?

Yes. Most recruitment boards use the word Classification in their official syllabus, while coaching material and question papers often print it as Odd One Out or Odd Man Out. The question type and the solving method are identical.

How do I solve Odd One Out questions quickly?

Read every option first, then name the property shared by the majority — category, divisibility, letter gap or spelling pattern. The option that fails that property is the answer. Checking the common rule before hunting for the odd item is the fastest approach.

Which exams ask Odd One Out questions?

SSC CGL, CHSL, MTS and GD, RRB NTPC and Group D, IBPS and SBI exams, NDA, CDS, AFCAT, and state exams including Haryana CET, Rajasthan CET, UPSSSC PET, DSSSB, Bihar Police, JSSC CGL, PSSSB and HP Rajya Chayan Aayog papers.

How many Odd One Out questions come in the exam?

It varies. Most SSC and state CET reasoning sections carry roughly 2 to 5 classification questions out of 25 to 50 reasoning questions. Banking prelims include them less often than SSC papers do. Always check the latest official notification for the current pattern.

Are Odd One Out questions asked in Hindi medium papers?

Yes. Papers for Haryana CET, UPSSSC PET, Bihar Police, RSSB CET and most northern state exams are bilingual, so the same question appears in Hindi as विषम शब्द चुनिए or बेमेल पद ज्ञात कीजिए.

Do Odd One Out questions have negative marking?

That depends on the exam. SSC and banking exams deduct marks for wrong answers. Several state CET papers, including Haryana CET, do not apply negative marking for wrong responses — but candidates should always confirm from the official notification, since marking rules change between cycles.

What is the best way to practise this topic?

Solve 20 to 25 mixed questions daily for two weeks, covering words, numbers, letters and figures. Keep a small notebook of the ones you got wrong and revise it weekly. Accuracy improves faster than speed at first, and that is the correct order.

Can two answers be correct in an Odd One Out question?

Sometimes more than one logic appears valid, but the official answer key follows the simplest and most widely accepted grouping. When in doubt, choose the classification a school textbook would use rather than an unusual one.

Is Odd One Out asked in non-verbal form too?

Yes. Figure-based classification appears in SSC CGL, SSC CPO, police constable and defence papers. In these questions you compare shapes by number of sides, symmetry, rotation or shaded regions instead of meaning.