SSC CGL • GENERAL INTELLIGENCE & REASONING • NOTE 18

Analogy

Notes for SSC CGL examinations — name the exact relationship, preserve its direction, and transfer the same rule from the first pair to the second.

1The Big Picture — Graphic Mind Map

Semantic

meaning • function • class • cause

Number

525
operation • digits • powers • sequence

Letter

DG
position • shift • opposite • pattern

Alphanumeric

B4E7
letters + numbers • dual rule

Figural

rotate • reflect • add • shade • count

Direction

AB
first → second, never vague association

Similarity

same
same relation, not same appearance

Verification

state rule • apply rule • reject extras
Analogy is not “these things are connected.” It is: “the same precise, directional rule changes the first item into the second item in both pairs.”

2The Foundation — Basics to Complete Relationship Mastery

2.1 Structure and Direction

\(A:B::C:D\)

Read: “\(A\) is related to \(B\) in the same way that \(C\) is related to \(D\).” First define the rule as a verb phrase from left to right.

CalfCow

Correct rule: “young one of → adult animal.” Reverse rule “adult of” is different. Therefore foal → horse matches; horse → foal does not.

Arule RBsay the arrow in words

2.2 The Five-Step Solver

Classify: word, number, letter or figure
State the narrowest rule for first pair
Preserve direction and order
Apply once to the new first term
Verify every feature; reject extras

If several rules fit the first pair, prefer the simplest standard rule that produces exactly one option. Options are evidence, but never permission to invent a strained rule.

2.3 Semantic Relationship Atlas

RelationshipDirection phraseModel pairWhat must remain same
Synonymmeans nearly the same asRapid : Swiftpart of speech and sense
Antonymopposite in meaning toExpand : Contractsame semantic dimension
Worker–toolnormally works withCarpenter : Sawprofession first, instrument second
Worker–workplacenormally works inChef : Kitchenperson first, place second
Object–functionis used toThermometer : Measure temperatureobject first, primary function second
Part–wholeis a component ofPage : Booksmaller unit first
Whole–partcontainsTree : Branchreverse of part–whole
Class–memberhas member/exampleMetal : Coppergeneral class first
Member–classbelongs to classRose : Flowerspecific first
Product–raw materialis made fromPaper : Pulpfinished item first
Cause–effectmay produceVirus : Diseasecause precedes effect
Instrument–measurementmeasuresBarometer : Pressureinstrument first, quantity second
Young one–adultdevelops intoLarva : Insectlife stage direction
Place–productis where this is produced/storedMint : Coinprecise institutional role
Degree/intensityis a stronger/weaker degree ofWarm : Hotsame quality, changed intensity

2.4 Synonym vs Associated Word

A synonym can substitute in a matching context. Mere association is weaker.

SilentQuiet

“Silence : Library” is object/typical place, not synonymy. Match the type of relation, not a loose topic connection.

samesenselinked only

2.5 Antonym Precision

True antonyms oppose on the same dimension and usually share grammatical form.

VictoryDefeat

“Victory : Enemy” is associated, not opposite. “Accept : Rejection” mixes verb and noun; prefer matching form when options allow.

victorydefeatsame dimension

2.6 Class–Member vs Part–Whole

A member is a complete example of a class; a part is a physical/structural component of a whole.

\(\text{Rose}\in\text{Flowers}\quad\text{but}\quad\text{Petal}\subset\text{Rose}\)

Use the test: “Is the first item itself a kind of the second, or merely inside it?”

roseflower classpetals are parts

2.7 Function, Tool, User and Workplace

These four frequently overlap, so encode direction explicitly:

Surgeonuses →Scalpel
Scalpelfunction →Cut
Surgeonworks in →Hospital

The pair “Surgeon : Scalpel” must match another professional → specialised tool, not tool → function.

persontoolfunctionworkplace

2.8 Cause, Effect, Source and Product

Ask what process links the nouns:

  • Cause → effect: friction → heat.
  • Source → product: bee → honey.
  • Raw material → product: clay → pottery.
  • Product → raw material: cloth → fibre.

Reversing source/product is a standard distractor.

causeprocesseffect

2.9 Number Analogy — Rule Hierarchy

Test simple, standard rules before complicated ones. A useful hierarchy:

single operation \(+,-,\times,\div\)
square, cube or root
two-step form \(ax+b\)
digit sum/product/reversal
factor, prime or positional pattern

A valid rule must reproduce the first result exactly and transfer unchanged to the second input.

input xsame rule Rsquare? ax+b?digit rule?output R(x)

2.10 Direct Arithmetic Rules

\(a:b::c:d\quad\text{with}\quad b=R(a),\ d=R(c)\)

Common forms: \(R(x)=x+k\), \(kx\), \(x^2\), \(x^3\), \(x(x+1)\), or \(x^2\pm k\).

Example: \(6:42::8:?\) can use \(x(x+1)\), giving \(8\times9=72\).

642x(x+1)8 → 72

2.11 Digit-Based Rules

For \(n=10a+b\), common transforms are:

\(S=a+b,\quad P=ab,\quad R=10b+a,\quad |a-b|\)

Example: \(34:12\) may be digit product \(3\times4\), so \(52:?\Rightarrow10\).

Do not switch from digit product in one pair to digit sum in another.

3412digits multiply

2.12 Symmetric and Reverse Rules

Some analogies reverse digits, swap positions, or use distance from a fixed number.

\(47:74::26:62\)

Check whether leading zero is allowed: reversal of \(40\) is usually \(4\), not \(04\), unless a fixed-width code is specified.

4774

2.13 Letter Position System

\(A=1,B=2,\ldots,Z=26\)
\(\text{opposite-letter positions sum to }27\)

Thus \(A\leftrightarrow Z\), \(B\leftrightarrow Y\), \(C\leftrightarrow X\). A shift of \(+k\) moves forward; \(-k\) moves backward. Wrap cyclically only if the pattern requires it.

LandmarkAEJMNTZ
Position\(1\)\(5\)\(10\)\(13\)\(14\)\(20\)\(26\)
AFMNUZopposites sum 27

2.14 Letter and Word Transformations

Track each position independently. Common rules:

  • all letters shift equally: CAT → FDW is \(+3,+3,+3\);
  • alternating shifts: \(+1,-1,+1,-1\);
  • reverse order; then shift;
  • replace each letter by its opposite;
  • move first/last letters or rotate positions.

Write a small shift vector under the first pair and copy it exactly.

\(C(3)\to F(6):+3\)
C A TF D W+3 +3 +3

2.15 Alphanumeric Dual Rules

Separate the letter and number components, then test whether each follows its own rule.

B4E16

Possible clean rule: letter \(+3\), number squared. Apply both, in the same order, to the new term.

\(B\to E:+3,\qquad4\to16:x^2\)
B4E16letter +3number square

2.16 Figural Rotation

Rotation preserves handedness and internal arrangement while every point moves around a centre. Record angle and direction: \(90^\circ\) clockwise, \(180^\circ\), etc.

A \(180^\circ\) rotation is not automatically a mirror reflection.

2.17 Reflection vs Rotation

A vertical mirror swaps left and right but keeps top/bottom; a horizontal mirror swaps top/bottom but keeps left/right. Reflection reverses handedness.

mirror

2.18 Figural Feature Ledger

For the first pair, record changes in a fixed order:

FeatureQuestions to ask
Orientationrotated by how much and which direction?
Positiondid an element move corner-to-corner, inside-to-outside, clockwise?
Countwere sides, dots, lines or components added/deleted?
Shadingdid shaded region move, invert or alternate?
Line stylesolid/dotted, thick/thin, straight/curved changed?
Sizeenlarged, reduced or swapped with another element?

Apply all changed features, not just the most visible one.

track every feature

2.19 Similarities and Differences

Two figures/items may be similar by relation while differing in surface form. Analogy asks for structural similarity.

  • Ignore irrelevant colour or size if the first pair ignores it.
  • Preserve a feature if it remains constant in the first transformation.
  • Reject an option that adds an extra transformation absent from the model.
\(\text{same relation}\ne\text{same appearance}\)
outer contains smaller same-centre shape

2.20 Choosing the Pair with the Same Relationship

When the question supplies a model pair and asks for a matching option, use a two-column test:

Name relation category
Write directional sentence
Test option left → right
Check specificity/degree
Reject reversed or broader pair

Example logic: “Scissors : Cut” means instrument → primary action. “Needle : Stitch” matches. “Tailor : Needle” is user → tool; “Cloth : Shirt” is material → product.

MODELscissors → cuttool → actionneedle → stitch ✓tailor → needle ✕cloth → shirt ✕relationship labeleliminates fast

3Short Tricks & Ninja Techniques

3.1 Convert the Pair into One Sentence

Replace “associated with” by a narrow arrow sentence:

\(A\xrightarrow{\text{exact verb}}B\)

“Author writes book” immediately rejects publisher–book, reader–book and book–author reversals.

authorwritesbook

3.2 Specific Before General

If “cobbler : awl” fits professional → specialised tool, do not dilute it to person → object. The narrower valid rule separates options.

person → object (too broad)worker → tool

3.3 Number Rule: Minimum Complexity

Try \(+,-,\times,\div\), powers and \(ax+b\) before digit gymnastics. Prefer the rule with fewer arbitrary constants.

\(7:51\Rightarrow7^2+2\) is cleaner than a multi-step digit story
7x²+251no extra steps

3.4 Use Options to Break a Tie

When two clean rules fit the model pair, apply both to the new input. Usually only one output appears. Do not design a rule backwards from a favourite option.

xR₁R₂which outputis offered?

3.5 Alphabet Anchors

Memorise \(E=5,J=10,M=13,N=14,T=20,Z=26\). Count short distances from anchors instead of reciting from \(A\).

\(A+Z=B+Y=\cdots=27\)
AEJMTZ5 • 10 • 13 • 20 • 26

3.6 Shift Vector for Letter Groups

Write numeric differences once:

\(ABC\to CED\Rightarrow(+2,+3,+1)\)

Copy the vector position by position to the second group. Use modular wrap beyond \(Z\) only when the analogy shows cyclic behaviour.

ABCC +2E +3D +1

3.7 Figural: Mark a Reference Point

Choose one asymmetric dot, notch or shaded corner. Track it first to identify rotation/reflection; then verify the remaining elements.

3.8 Count Change Before Shape Change

In complex figures, count sides, dots and internal lines first. A simple \(+1\) or \(-1\) count rule may be the true analogy while orientation is unchanged.

3 sides,1 dot4 sides,2 dots

3.9 Fast Decision Board

word pair
write a narrow directional verb
number pair
test simplest exact operation first
letters
convert to positions and copy shift vector
figure
track orientation, position, count and shading

4The SSC / TCS Traps — Red Flags & Edge Cases

🚩 Trap 1: Correct Association, Wrong Relation

“Doctor : Hospital” and “Teacher : Book” are both associated, but the first is worker–workplace; the second is worker–resource.

doctorworks innot merelylinked to

🚩 Trap 2: Direction Reversed

“Puppy : Dog” is young → adult. “Cat : Kitten” reverses it and is therefore wrong despite using the correct animal family.

\(A\to B\ne B\to A\)
youngadultwrong reverse

🚩 Trap 3: Part vs Member

A wheel is part of a car; a sedan is a member/type of cars. Both can be “inside the idea of car,” but structurally differ.

wheel = partclass: carsedan ∈

🚩 Trap 4: Overfitted Number Rule

One pair can support infinitely many formulas. Reject rules with arbitrary constants or special exceptions when a standard operation fits.

\(4:16\Rightarrow x^2\ \text{before inventing}\ 5x-4\)
4x² ✓5x−4 ?16

🚩 Trap 5: Changing the Rule Midway

If \(34\to12\) uses digit product, \(52\) must also use digit product. Sum, product and reversal cannot be mixed just to reach an option.

\(3\times4=12\Rightarrow5\times2=10\)
3412×digitssame rule

🚩 Trap 6: Alphabet Wrap Assumed

A \(+3\) shift from \(Y\) gives \(B\) only if cyclic wrap is part of the demonstrated rule. Otherwise the item may use backward shift or another pattern.

\(Y(25)+3=28\equiv2\pmod{26}\Rightarrow B\)
A … Zwrap onlywhen patternsupports it

🚩 Trap 7: Mirror Mistaken for Rotation

Track an asymmetric marker. Rotation preserves clockwise ordering; reflection reverses it.

mirror reverses hand

🚩 Trap 8: One Feature Matched, Another Ignored

An option may rotate correctly but shade the wrong corner, or add the right dot while changing line style. All model changes must transfer.

move shade + dot together

🚩 Trap 9: Knowledge Fact Too Broad

“India : Asia” is country → continent. “Nile : Africa” is river → continent, not the same relation, even though both locate something geographically.

country ∈ continentnot any placelocated there
Exam-pressure rule: never select an option merely because both words/numbers/figures “look connected.” Write the rule in one directional line and check every changed feature before marking.

5Memory Hooks & Mnemonics — Visual Recall

5.1 “Same Arrow, New Pair”

Imagine copying the labelled arrow from \(A\to B\) and pasting it between \(C\) and the answer.

ARULEBC?

5.2 “NAME It Before You CLAIM It”

NAME the relationship category and arrow sentence before claiming an option. This blocks association-based guesses.

NAMECLAIMrule first, option second

5.3 “Member IS; Part IS IN”

A rose is a flower (member/class). A petal is in a rose (part/whole).

roserose IS flowerpetal IS IN rose

5.4 “27 Makes Alphabet Mirrors”

Opposite letter positions sum to \(27\): \(1+26,2+25,\ldots,13+14\).

\(p_{opposite}=27-p\)
AZ1+26=27

5.5 “Numbers Enter the Same Machine”

Both first terms enter one unchanged rule machine. If the machine’s gears change, the analogy is invalid.

xR

5.6 “Red Dot Never Lies”

In figural analogy, follow one asymmetric marker. Its path reveals rotation or reflection before the busy design distracts you.

5.7 “R-C-P-S” Figural Scan

Scan in order: Rotation/reflection, Count, Position, Shading/style.

RCPS

5.8 “Exact Beats Clever”

The winning rule is exact, transferable and economical—not the most imaginative explanation.

simple exact ✓clever maze ✕

One-Line Recall Strip

Semantic
name the narrow directional relation
Number
same simplest exact machine
Letter
positions, anchors, shift vector
Figure
R-C-P-S: orientation, count, position, shade