Analogy (RRB)

Analogy questions look like vocabulary tests, but they are really logic tests in disguise. They check one skill: can you spot a hidden relationship in one pair and apply that exact relationship to a new pair? They appear in almost every competitive exam, and the secret to cracking them fast is precision, not a fat vocabulary. This lesson covers verbal, numerical and letter analogies, and the one habit that separates fast solvers from slow guessers.

Definition: An analogy is a question that gives you one related pair (written A : B) and asks you to find another pair (C : ?) that shares the same relationship — same type and same direction.

The golden first step — pin the relation down precisely

Before you even glance at the options, ask: "How exactly is A related to B?" Your answer must be specific enough that only one option can fit. Compare two ways of describing cow : calf — "both are animals" is far too loose and would let several wrong options seem right, while "B is the young of A" is tight and instantly rejects everything else. The biggest mistake students make is choosing a relation that is too vague; a vague relation makes the question harder, a precise one makes it almost solve itself.

A second discipline is direction. If A→B means "tool of the worker," then C→D must mean exactly that, not the reverse. Reversing the direction is a classic trap option.

Common verbal relation types

Train your eye to recognise these standard patterns instantly:

• Synonym (big : large) and antonym (rise : fall)
• Cause–effect (rain : flood)
• Worker–tool (carpenter : saw) and worker–product (baker : bread)
• Object–use (pen : write) and part–whole (petal : flower)
• Male–female (lion : lioness) and adult–young (dog : puppy)
• Country–capital (India : Delhi) and country–currency (Japan : Yen)
• Measurement (length : metre) and degree of intensity (warm : hot)

Numerical / mathematical analogy

Here you hunt for a math rule linking the two numbers:

• Squares and cubes: 5 : 25 and 7 : 49 are square relations; 2 : 8 and 3 : 27 are cube relations.
• Place in a series: 4 : 16 :: 6 : ? — since 4² = 16, apply the same rule: 6² = 36.
• Mixed operations: 2 : 9 :: 3 : ? — test 2² + 5 = 9, so 3² + 5 = 14.

The trick is to test the simplest operation first (add, multiply, square) and only escalate if it fails.

Letter analogy

Letter analogies are about the gap between letters in the alphabet. In AB : CD :: EF : ?, each pair jumps forward by 2 positions (A→C, B→D), so the answer keeps the same jump from EF, giving GH. Sometimes the shift runs backward (e.g. ZY : XW), so always check both directions before committing. Writing the alphabet position numbers (A=1, B=2, …) often makes a hidden gap obvious.

CAT-style word pairs

A harder format gives you two complete pairs and asks which option pair shares the same kind of relationship as the question pair. The method is the same: name the relationship in the question pair precisely, then test each option pair against it until exactly one matches in both type and direction.

Why it matters: analogy questions are quick, almost free marks once you train the "define the relation first" habit. They also build the logical-mapping muscle that powers coding, classification and series questions across the whole reasoning section.

Real-world example: Think of analogies the way a doctor reads symptoms. "Fever : infection" maps the same way as "rust : moisture" — both are effect : cause. Once you name the relationship out loud ("this is cause and effect"), the matching pair almost picks itself, exactly as a diagnosis follows once the underlying pattern is named.

Common misconception: Beginners pick the option that is merely from the same category as the answer — "it's also a bird," "it's also a number." Category overlap is not a relationship. The correct pair must reproduce the specific link (young-of, tool-of, capital-of), in the same direction, not just sit in the same broad topic. Lion : cub is correct for cow : calf; lion : tiger (both cats) is the trap.

:::compare Vague relation vs Precise relation

:::keypoints Key points

• First, state the relation between A and B as precisely as possible.
• A vague relation lets multiple options seem right; a tight one isolates the answer.
• Memorise standard relation types: synonym, cause–effect, worker–tool, part–whole, etc.
• For number analogies, test add/multiply first, then squares, cubes and mixed rules.
• For letters, keep the same alphabet gap and check both forward and backward shifts.
• Keep the same direction (A→B and C→D), never a reversed one.
• "Same category" is not the same as "same relationship."
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  :::memory
• Define the relationship before you read the options — name it, then claim it.
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  :::recap
• Define the relationship precisely before scanning options.
• Specificity, not vocabulary size, is what cracks analogies.
• Numerical and letter analogies follow consistent rules and gaps.
• Same category is never the same as same relationship.
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Analogy questions ask you to find a word or number that relates to a third term the same way two given terms relate to each other. They are quick, high-frequency scorers in nearly every aptitude and reasoning exam — most take under a minute once you learn to name the relationship before you answer. This lesson works through varied examples and the traps that catch the unwary.

Definition: An analogy takes the form A : B :: C : ?, read as "A relates to B as C relates to ?". Your task is to pin down the exact relationship between A and B, then apply that identical relationship to C.

The one habit that wins marks

Before you even look at the options, state the relationship in plain words: "profession to tool", "consecutive squares", "country to currency". The moment you can name it, the correct answer usually announces itself and the decoys fall away. Skipping this step — grabbing the first option that "feels right" — is the single biggest cause of wrong answers.

Types of analogies you will meet

1. Semantic (word meaning): worker–tool, object–use, cause–effect, part–whole, synonym, antonym.
2. Number patterns: squares, cubes, n×(n+1), arithmetic steps.
3. Alphabet patterns: letters shifted by a fixed amount.
4. General knowledge: country–currency, country–capital, animal–young.

Worked examples

Question: Doctor : Stethoscope :: Carpenter : ?
Solution:
Step 1: Name the relation — "professional : the tool they use".
Step 2: Apply it to a carpenter (the tool, not the material).
Conclusion: Saw (or hammer) — a carpenter's tool.

Question: 49 : 64 :: 81 : ?
Solution:
Step 1: 49 = 7² and 64 = 8² — consecutive perfect squares.
Step 2: 81 = 9², so the next consecutive square is 10².
Conclusion: 100.

Question: ACE : BDF :: GIK : ?
Solution:
Step 1: Each letter shifts forward by one (A→B, C→D, E→F).
Step 2: Apply +1 to G, I, K → H, J, L.
Conclusion: HJL.

Question: India : Rupee :: Bangladesh : ?
Solution:
Step 1: The relation is "country : its currency".
Step 2: Recall Bangladesh's currency.
Conclusion: Taka.
(Handy set: Nepal/Sri Lanka/Pakistan — Rupee; Myanmar — Kyat; Thailand — Baht; China — Yuan; Japan — Yen; Russia — Ruble; UK — Pound; EU — Euro.)

Question: 6 : 42 :: 7 : ?
Solution:
Step 1: 42 = 6 × 7, i.e. the pattern is n × (n + 1).
Step 2: For n = 7, compute 7 × 8.
Conclusion: 56.

Question: Square : Cube :: Circle : ?
Solution:
Step 1: The relation is "2-D shape : its 3-D counterpart".
Step 2: The 3-D version of a circle.
Conclusion: Sphere.

Common traps

• Order matters. "India : Rupee" is country : currency, so reversing it to "Rupee : India" is currency : country — a different relation. Keep the direction consistent.
• "Too obvious" decoys. Doctor : Stethoscope :: Carpenter : Wood looks plausible, but the original is profession : tool, not profession : material. Saw is correct.
• Pick the most specific fit. When two relationships both seem to work, choose the narrower, more precise one.

Why it matters: Analogies are fast, reliable points, and the relation-spotting skill transfers directly to classification ("odd one out"), coding-decoding, and series questions across SSC, banking, RRB, and campus placement tests.

Real-world example: Think of a locksmith and a key, or a tailor and scissors. Once you've internalised the pattern "worker : tool", you can instantly complete "Plumber : ?" with Wrench — the everyday version of the doctor–stethoscope pattern.

Common misconception: That you should answer as soon as one option "fits". Many students lock onto the first plausible choice and miss a better one. The fix is to name the relationship in words first, then scan the options — this one habit eliminates most errors.

:::compare Spotting the pattern

:::keypoints Key points

• Always state the A–B relationship in words before answering.
• Test numbers for squares, cubes, n×(n+1), or constant steps.
• Test letters for a fixed alphabetical shift.
• Order is part of the relation — never reverse it.
• Reject "obvious" decoys that match a different relation.
• When two relations fit, choose the most specific one.
• Keep common country–currency pairs ready for GK analogies.
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  :::memory
• "Name it, then claim it" — name the relationship, then claim the matching answer.
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  :::recap
• Identify the exact link, then apply it to the third term.
• Check arithmetic, alphabetical, and semantic patterns in turn.
• Specificity and correct order separate right from wrong answers.
• Naming the relation first kills most decoys.
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