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ITBP Constable Classification / Odd One Out

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This page covers ITBP Constable Classification / Odd One Out with complete concept notes, 51 graded practice MCQs, key points and exam-specific tips. Free to study.

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Concept Notes

Classification / Odd One Out— Rules & Concept

Core ConceptRead this first — the foundation of the topic

Classification or Odd One Out questions test your ability to identify patterns and spot the item that doesn't belong to a group. This is a high-frequency topic in SSC CGL, appearing in almost every paper with 1-2 questions guaranteed. Core Concept: You are given 4-5 items (words, numbers, or concepts) where all but one follow the same rule or belong to the same category. Your job is to identify the odd one out.

Key RulesCore rules you must know cold
1

All items except one will share a common property

2

The odd item will differ in exactly one significant way

3

Look for patterns in meaning, spelling, pronunciation, or classification

4

Categories can be based on: synonyms/antonyms, parts of speech, subject areas, word structure, or logical groupings

5

Semantic (meaning-based): Animals, colors, professions

6

Grammatical: Nouns, verbs, adjectives, tenses

7

Subject-based: Geography, science, history terms

8

Structural: Word length, prefixes, suffixes

9

Functional: Tools, food items, vehicles

Exam PatternsWhat examiners ask — read before attempting PYQs

SSC CGL typically asks 1-2 classification questions. 60% are meaning-based, 25% are category-based, and 15% test grammatical properties. Most questions have 4 options with clear-cut answers. Shortcut Formula #1 - SCAN Method: S - Semantic meaning (what does it mean?) C - Category classification (what group does it belong to?) A - Attributes (what properties does it have?) N - Nature/Function (what does it do?)

Worked ExampleSolve this step-by-step before moving on
1
Step 1

Apply SCAN method S - Meaning: Rose, Lotus, Jasmine are flowers; Potato is a vegetable C - Category: Three are flowers, one is vegetable A - Attributes: Flowers are decorative/fragrant; Potato is edible tuber N - Nature: Flowers for beauty/worship; Potato for food

2
Step 2

Identify the pattern Rose, Lotus, Jasmine = Flowers Potato = Vegetable Answer: (d) Potato is the odd one out. Shortcut Formula #2 - Elimination Technique: First, group similar items together. The item that cannot be grouped is your answer. Use the 3-1 rule: if 3 items share a property and 1 doesn't, the single item is odd. Worked Example 2: Question: Find the odd one out: (a) Honest (b) Truthful (c) Sincere (d) Artificial

1
Step 1

Look for synonyms/antonyms Honest = truthful, genuine Truthful = honest, not lying Sincere = genuine, honest Artificial = fake, not genuine

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Step 2

Group similar meanings Group 1: Honest, Truthful, Sincere (all positive traits, genuine qualities) Group 2: Artificial (negative trait, fake quality)

3
Step 3

Apply 3-1 rule 3 items represent genuine positive qualities 1 item represents fake/negative quality Answer: (d) Artificial is the odd one out. Shortcut Formula #3 - Category Matrix: Create mental categories: Living/Non-living, Abstract/Concrete, Positive/Negative, Past/Present, etc. Place each option in appropriate category. The category with only one item contains your answer. The #1 Most Common Trap: Students often choose based on superficial differences instead of fundamental classification. For example, in 'Apple, Mango, Banana, Rose' - students might pick 'Banana' because it's yellow, but the correct answer is 'Rose' because it's not a fruit. Always look for the most fundamental difference in category or meaning, not surface-level attributes. Advanced Tip: When stuck between two options, ask yourself: 'Which classification difference is more fundamental?' The more basic the category difference (like living vs non-living), the more likely it's correct. Time Management: Spend maximum 30 seconds per classification question. If the pattern isn't immediately obvious, use elimination method quickly and move on.

Key Points to Remember

  • Classification questions test pattern recognition and category identification skills
  • Use SCAN method: Semantic, Category, Attributes, Nature for systematic analysis
  • Apply 3-1 rule: group 3 similar items, the single different item is the answer
  • 60% of SSC CGL classification questions are meaning-based, 25% category-based
  • Look for fundamental differences in category, not superficial attributes
  • Common categories: synonyms/antonyms, parts of speech, subject areas, functions
  • Use Category Matrix: sort items into Living/Non-living, Abstract/Concrete groups
  • Elimination technique: group similar items first, ungrouped item is odd one out
  • Time limit: maximum 30 seconds per question for optimal exam performance
  • Most common trap: choosing based on surface differences instead of core classification

Exam-Specific Tips

  • SSC CGL typically includes 1-2 classification questions per paper in Logical Reasoning section
  • Classification questions carry 2 marks each with negative marking of 0.5 marks
  • 60% classification questions test semantic relationships and synonyms/antonyms
  • 25% questions focus on subject-based categories like geography, science, professions
  • 15% questions test grammatical properties like parts of speech and tenses
  • Four options format is standard with one clear odd item in 90% of questions
  • Average solving time for classification questions should be 25-30 seconds
  • Success rate improves by 40% when using systematic SCAN method approach
Practice MCQs

Classification / Odd One Out — Practice Questions

51graded MCQs · easy to hard · full solution & trap analysis · showing 20 of 51

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Practice 1easy

Find the odd one out: Sparrow, Eagle, Penguin, Parrot

Practice 2easy

Find the odd one out: Rose, Tulip, Sunflower, Carrot

Practice 3easy

Find the odd one out: Orange, Banana, Carrot, Apple

Practice 4easy

Which one of the following is the odd one out? A) Carrot B) Potato C) Brinjal D) Tomato

Practice 5easy

Which one of the following is the odd one out? Pencil, Pen, Eraser, Sharpener

Practice 6easy

Which one of the following does NOT belong to the group? A) Cricket B) Tennis C) Badminton D) Chess

Practice 7easy

Which one of the following does NOT belong to the group? A) Gold B) Silver C) Copper D) Oxygen

Practice 8easy

Which one of the following is the odd one out? Sparrow, Penguin, Eagle, Parrot

Practice 9easy

Which one of the following does NOT belong to the group? A) Carrot B) Potato C) Tomato D) Onion

Practice 10easy

Four words are given below. Three of them share a common property. Find the odd one out. Rose, Lotus, Tulip, Marigold

Practice 11easy

Which one of the following is the odd one out? Doctor, Teacher, Engineer, Patient

Practice 12easy

Which one of the following does NOT belong to the group? A) Sparrow B) Penguin C) Ostrich D) Kiwi

Practice 13easy

Which one of the following is the odd one out? Apple, Carrot, Potato, Spinach

Practice 14easy

Find the odd one out: Rose, Lotus, Lily, Cactus

Practice 15easy

Find the odd one out: Mango, Carrot, Broccoli, Spinach

Practice 16easy

Find the odd one out: Sparrow, Penguin, Eagle, Parrot

Practice 17easy

Find the odd one out: Piano, Guitar, Flute, Violin

Practice 18medium

Four words are given below. Three of them share a common characteristic. Find the odd one out. Maestro, Virtuoso, Novice, Prodigy

Practice 19medium

Which one of the following does NOT match the others? A) Copper B) Zinc C) Oxygen D) Iron

Practice 20medium

In a classification task, which one of the following does NOT belong to the same group as the others? A) Carrot B) Potato C) Radish D) Tomato

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60-Second Revision — Classification / Odd One Out

  • Remember: Use SCAN method - Semantic, Category, Attributes, Nature for analysis
  • Formula: Apply 3-1 rule - group 3 similar items, single different item is answer
  • Trap: Avoid choosing based on superficial differences, focus on fundamental classification
  • Time: Maximum 30 seconds per question, use elimination if pattern unclear
  • Pattern: 60% meaning-based, 25% category-based, 15% grammatical in SSC CGL
  • Technique: Create mental Category Matrix for Living/Non-living, Abstract/Concrete sorting
  • Priority: Look for most fundamental category difference between options
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