Why this topic matters · 6 min read
Analogy questions test your ability to find the same relationship between two pairs of words, numbers, or letters. In RRB Group D, this is one of the most frequently asked reasoning topics — expect 3 to 5 questions per exam. Questions are straightforward but tricky if you miss the exact type of relationship. Most questions involve word pairs (like tool-use, animal-home, part-whole) or number pairs (like squares, cubes, multiples). Getting all of these right is realistic with 10 minutes of focused prep.
What is Analogy
Analogy means finding a similar relationship. You are given a pair that shares a specific connection, and you must find another pair that shares the exact same connection. Think of it like a lock and key — once you identify what kind of lock the first pair uses, you find the key that fits the second pair the same way. The relationship can be based on meaning, function, category, size, part-whole, worker-tool, animal-sound, place-product, and more.
- Always identify the relationship in the given pair first before looking at options.
- Relationships can be: function, category, part-whole, worker-tool, animal-young, animal-home, cause-effect, synonym-antonym, product-place.
- Do not guess — eliminate options that do not match the exact relationship.
- Be careful about direction: Pen is to Writer is different from Writer is to Pen.
- In letter/number analogy, first find the pattern (difference, square, reverse, skip) then apply it.
Word Analogy (Semantic)
These questions use real-world relationships between two words. The most common types in RRB Group D are: worker and tool (Carpenter : Saw), animal and home (Lion : Den), animal and young (Cow : Calf), part and whole (Leaf : Tree), product and place (Steel : Factory), and cause and effect (Fire : Ash). Your job is to match the same type of relationship in the answer pair.
- Worker-Tool: Carpenter-Saw, Barber-Razor, Doctor-Stethoscope, Farmer-Plough.
- Animal-Home: Lion-Den, Bee-Hive, Bird-Nest, Horse-Stable, Dog-Kennel.
- Animal-Young: Cow-Calf, Cat-Kitten, Frog-Tadpole, Horse-Foal, Hen-Chick.
- Part-Whole: Petal-Flower, Page-Book, Spoke-Wheel, Brick-Wall.
- Product-Source: Milk-Cow, Wool-Sheep, Silk-Silkworm, Honey-Bee.
- Always check if the relationship direction is the same in the answer pair.
Number Analogy
A pair of numbers is given with a hidden mathematical relationship, and you must find the missing number in the second pair using the same rule. Common patterns in RRB Group D include: adding a fixed number, multiplying, squaring, cubing, doubling, or a combination like multiply then add. Always check: is it the same operation on both numbers, or an operation between the two numbers in the pair?
- Check difference first: 4:9 — difference is 5. Then check if 5 is added, or if 4+5=9.
- Check square/cube: 3:9 means 3 squared. So 5:25 follows the same rule.
- Check ratio: 4:8 means ratio 1:2. So 7:14 or 5:10 would be the answer.
- Check double-operation: 3:7 means 3x2+1=7. Then 5:11 (5x2+1=11).
- Write the operation clearly before looking at options — do not guess.
Key formulas
Square Rule
a : a^2 (example: 4:16, 7:49)
When: When the second number is the square of the first
Difference/Addition Rule
a : (a + k) where k is constant
When: When both pairs have the same fixed difference
Multiplication Rule
a : (a x k) where k is constant
When: When ratio between numbers in each pair is constant
Double Operation Rule
a : (a x m + c)
When: When simple square/difference/ratio does not fit — try multiply then add or subtract
Worked examples
Example 1: 6 : 36 :: 8 : ? Step 1 - Relationship: 6 squared = 36. Step 2 - Apply same: 8 squared = 64. Answer: 64.
Example 2: 3 : 7 :: 5 : ? Step 1 - Check: 3x2+1=7. Step 2 - Apply: 5x2+1=11. Answer: 11.
Letter Analogy
A pair of letter groups is given, and you must find the same alphabetical pattern. Common patterns are: reversing the letters, skipping fixed positions in the alphabet, mirror positions (A=Z, B=Y), or moving forward or backward by a fixed number of steps. Tip: Always write A=1, B=2, C=3 ... Z=26 on rough paper at the start of the reasoning section. It saves time.
- Forward skip: AC : EG (skip 1 letter — B and D are skipped). Same gap in answer pair.
- Reverse: ABC : CBA — same letters, reversed order.
- Mirror: A=Z, B=Y, C=X (A+Z=27, always). So ACE : ZXV.
- Position shift: BD : FH (both letters move +2). Same shift in second pair.
- Mixed: First letter moves +2, second letter moves -1 — check each letter separately.
Worked example
Example: BDF : GIK :: ACE : ? Step 1 - BDF to GIK: B+5=G, D+5=I, F+5=K. Step 2 - Apply same +5 to ACE: A+5=F, C+5=H, E+5=J. Answer: FHJ.
Mixed or GK-Based Analogy
Some analogy questions use general knowledge facts — like capital cities, currencies, languages, or scientific instruments. These are pure memory questions. RRB Group D occasionally includes these. Common themes: Country-Capital (India-New Delhi), Country-Currency (Japan-Yen), Scientist-Invention (Fleming-Penicillin), Instrument-Measurement (Thermometer-Temperature).
- Country-Capital: France-Paris, Japan-Tokyo, Australia-Canberra.
- Country-Currency: USA-Dollar, UK-Pound, Japan-Yen, India-Rupee.
- Instrument-Measurement: Barometer-Pressure, Seismograph-Earthquakes, Ammeter-Current.
- These are bonus marks — memorise a short list of 15-20 pairs before the exam.
⚠ Common mistakes to avoid
- Confusing direction of relationship: Pen : Writer is tool-user, but Writer : Pen is user-tool. If you reverse the direction in the answer, you get it wrong.
- In number analogy, jumping to square/cube without checking simple addition or multiplication first — always check simplest rule first.
- In letter analogy, forgetting that some questions shift each letter by a different amount — do not assume all letters in the group shift equally.
- Choosing an answer that is in the same category but not the same relationship — for example, Lion:Den :: Dog:Bone is wrong (Bone is not Dog's home). Dog:Kennel is correct.
- Wasting time on GK-based analogy if you do not remember the fact — skip and come back. Do not block time on a memory question when calculation-based ones are faster.
🧠 Memory aids
- LOCK-KEY trick: First pair = Lock (defines the type of relationship). Second pair = Key (must fit the same lock exactly). Wrong relationship = wrong key.
- For animal pairs, remember HYMN: Home-Young-Male-Name (Den-Cub-Lion-Leo). Use this to recall all four facts about common animals at once.
- For letter analogy, write A=1 to Z=26 in a row on rough paper immediately — call it your alphabet ruler. Every letter question becomes arithmetic.
- For number analogy, try rules in this order: Difference, Ratio, Square, Cube, Double-operation. Remember DR SCubeD — Difference, Ratio, Square, Cube, Double.
🎯 RRB GROUP D exam tips
- RRB Group D analogy questions are mostly Easy to Medium. Expect 3-5 questions. All correct is realistic if you practice 50-60 pairs before the exam.
- Word analogy appears more often than number analogy in recent RRB Group D papers — focus more on animal-home, worker-tool, and part-whole pairs.
- Time limit: Each analogy question should take maximum 30-40 seconds. If a question takes more than 60 seconds, mark and move on.
- In number analogy, if you find the pattern in 5 seconds, confirm it with a quick reverse check before marking — examiners often place a trap option that is one step off.
- Letter analogy in RRB Group D usually involves simple forward or backward shifts — very rarely involves complex patterns. Do not overthink these.