Analogies and Classification
Overview
Analogies and Classification are high-scoring topics in Railway NTPC and Group D Reasoning sections. Analogies test the ability to identify relationships between pairs of words, numbers, or letters. Classification tests the ability to find the 'odd one out' from a group. Both question types appear regularly (4–8 questions per paper) and can be solved quickly with practice, pattern recognition, and a strong vocabulary of relationships.
Typed Notes
Word Analogies — Types and Tricks
Word analogies test vocabulary and logical relationships. Key relationship types tested in Railway exams: (1) Synonyms/Antonyms — Hot:Cold :: Day:Night; (2) Part-Whole — Wheel:Car :: Page:Book; (3) Worker-Tool — Carpenter:Saw :: Painter:Brush; (4) Animal-Young — Cow:Calf :: Horse:Foal; (5) Animal-Sound — Dog:Bark :: Cat:Meow; (6) Country-Capital — India:New Delhi :: Japan:Tokyo; (7) Product-Raw Material — Paper:Wood :: Glass:Sand. Tip: Always define the relationship in a sentence first, then apply it to the second pair. Avoid assumptions — stick to the most direct relationship.
Number Analogies — Patterns to Spot
Number analogies are very common in NTPC Tier-1 and Group D. Steps to solve: (1) Find the operation linking the first pair — addition, subtraction, multiplication, division, squares, cubes, or prime numbers. (2) Apply the SAME operation to the third number to find the fourth. Example: 4:16 :: 5:25 (squares). Example: 3:12 :: 5:20 (multiply by 4). Example: 7:343 :: 4:64 (cubes). Memory Hook — 'DMSSP' — Division, Multiplication, Subtraction, Squares, Primes. Always verify your answer by checking the ratio or difference is consistent across both pairs.
Letter Analogies — Alphabet Position Method
Letter analogies use the position of letters in the English alphabet (A=1, B=2 … Z=26). Steps: (1) Write the position numbers of each letter. (2) Find the pattern — forward/backward steps, reversal, or skipping. Example: AC:EG :: IK:MO (each letter moves +4). Example: AB:ZY :: CD:XW (mirror/reverse pairs). Tip: Memorize positions of all 26 letters. Quick trick — letters from the end: Z=26, Y=25, X=24, W=23, V=22. In Railway exams, letter analogy questions often involve gaps of 2, 3, or 4 positions — check this first.
Classification (Odd One Out) — Strategy
Classification questions give 4–5 items; one does not belong to the group. Categories commonly tested: (1) Fruits vs Vegetables — Tomato is a fruit (botanically) but may be grouped as vegetable in context; read options carefully. (2) Planets — Mercury, Venus, Earth, Moon: Moon is NOT a planet. (3) Metals vs Non-metals. (4) States vs Union Territories. (5) Number groups — odd, even, prime, perfect squares. Strategy: Find what THREE items share, then the fourth is the odd one. Avoid over-thinking — the most obvious common property is usually correct in Railway papers. Elimination works best here.
Key Concepts
Revision ke liye ek nazar — exam se pehle yahi padhna hai.
- 01Analogy means 'similar relationship' — if A:B :: C:D, then A relates to B in the same way C relates to D.
- 02Types of analogies: Word (semantic), Number, Letter, and Mixed analogies — all appear in NTPC/Group D papers.
- 03Classification (Odd One Out) requires finding one item that does NOT share the common property of the other three or four items.
- 04Common analogy relationships: Part-Whole, Tool-Work, Animal-Sound, Country-Capital, Product-Raw Material, Worker-Tool.
- 05In number analogies, always check: difference, ratio, square, cube, or prime relationships between the given number pairs.
Questions & Solutions
Pehle khud try karo — phir solution kholo. Yahi tariqa topper banata hai.
Doctor : Hospital :: Teacher : ?
Find the odd one out: Mars, Jupiter, Moon, Saturn
6 : 36 :: 8 : ?
Find the odd one out: AC, EG, IK, MO, QS, UW, YA
Pen : Write :: Knife : ?
Analogies (Word, Number, Letter) and Classification (Odd One Out) are easy scoring topics in Railway NTPC and Group D. Master relationship types for word analogies, use DMSSP for number analogies, use alphabet positions for letter analogies, and apply the 'find what three share' rule for classification. With 2–3 minutes of practice per question type daily, aspirants can score full marks in this chapter.
Chapter-end quiz
4 MCQsOption tap karo — turant pata chalega sahi ya galat, explanation ke saath.
Q1.Odometer : Speed :: Thermometer : ?
Q2.Find the odd one out: 16, 25, 36, 48, 49
Q3.BDFH : JLNP :: RTVX : ?
Q4.Which is the odd one out: Cobra, Viper, Python, Crocodile?
Mark karo — dashboard par progress dikhega.