Free RRB Group D 2026: Exam Quick Reference

General Intelligence and Reasoning

30%of exam

AnalogiesSeriesCodingRelationshipsSyllogismsVenn Diagrams

General Science

25%of exam

PhysicsChemistryLife ScienceCBSE Class 10UnitsApplications

Mathematics

25%of exam

ArithmeticAlgebraMensurationWorkDistanceStatistics

General Awareness and Current Affairs

20%of exam

Science TechnologySportsCulturePersonalitiesEconomicsPolitics

Quick Facts

Notice: CEN 09/2025
Questions: 100
Duration: 90 minutes
Eligible extra time: 120 minutes
Correct: +1 mark
Wrong: −1/3 mark
Subject split: Indicative only
Tentative CBT: August 3–21, 2026
PET shortlist: About 3× vacancies
DV shortlist: 1:1 vacancies
Pass rate: Not published

Opposite Letters

Opposite alphabet positions always total twenty-seven

A and ZB and YM and NPosition: 27−x

Reasoning Method Picker

Number pattern→Differences then ratios
Pattern alternates→Split odd-even terms
Letters shift→Write alphabet positions
Family statement→Draw generation tree
Turns and movement→Plot coordinates
Categorical statements→Draw minimal Venn
Set counts overlap→Inclusion-exclusion
Statement sufficiency→Test each alone
Analogy question→Name relationship first
Odd item question→Find shared property

Series and Coding

First differences: Check adjacent gaps
Second differences: Check gap changes
Ratio pattern: Check multiply then add
Alternating series: Split odd and even
Square pattern: Compare n² values
Cube pattern: Compare n³ values
A1Z26: A=1 through Z=26
Reverse alphabet: Position becomes 27−x
Letter shift: Apply equal movement
Word coding: Infer rule from pairs
Analogy: Match relationship type
Classification: Find broken property

CBT Attempt Decision

Answer known directly→Answer then verify
One quick calculation→Solve immediately
Two options remain→Seek confirming clue
No method appears→Mark and move
Calculation runs long→Estimate against options
Units differ→Convert before solving
Negative wording appears→Underline exception
Final review begins→Check marked items

Logic, Relations, and Directions

Syllogism: Draw minimal Venn
All A are B: A inside B
No A is B: Separate circles
Some A are B: Overlap required
Possibility claim: Check allowed arrangement
Blood relation: Draw generation tree
Maternal relation: Trace mother side
Paternal relation: Trace father side
North movement: Increase vertical coordinate
East movement: Increase horizontal coordinate
Net distance: Use Pythagoras
Venn counting: Subtract overlaps once
Data sufficiency: Judge statements separately
Clock raw angle: θ = |30h − 5.5m|
Smaller clock angle: min(θ, 360°−θ)

Circuit Constants

Series Shares Current; Parallel Preserves Potential

Series same currentParallel same voltageSeries resistances add

Speed vs Velocity

Speed

Scalar quantity
Distance per time
No direction

Velocity

Vector quantity
Displacement per time
Includes direction

Distance scalar; displacement vector

Science Concept Picker

Motion changes→Force and momentum
Energy transfer asked→Work and power
Circuit values given→Ohm law
Multiple resistors→Series-parallel rules
Light changes direction→Reflection or refraction
Solution classification→Check pH
Reaction swaps element→Reactivity series
Organ function asked→Map functional unit
Trait inheritance asked→Alleles and dominance

Physics Formulas and Units

Force: F = manewton
Momentum: p = mvkg·m/s
Work: W = Fs cosθjoule
Power: P = W/twatt
Kinetic energy: mv² ÷ 2
Potential energy: mgh
Pressure: Force ÷ areapascal
Density: Mass ÷ volume
Ohm law: V = IR
Electric power: P = VI
Electric charge: Q = It
Wave speed: v = fλ
Frequency unit: hertz
Series resistance: Add resistances
Parallel resistance: Add reciprocals
Convex lens: Converges parallel rays
Concave lens: Diverges parallel rays

Mass vs Weight

Mass

Matter quantity
Measured in kilograms
Location independent

Weight

Gravitational force
Measured in newtons
Equals mg

Mass stays; weight varies

Chemistry Core

Acidic solution: pH below 7 at 25°C
Neutral solution: pH equals 7 at 25°C
Basic solution: pH above 7 at 25°C
Acid plus base: Salt plus water
Oxidation: Gains oxygen; loses hydrogen
Reduction: Loses oxygen; gains hydrogen
Displacement: More reactive replaces less
Corrosion: Slow surface oxidation
Catalyst: Changes reaction rate
Atomic number: Proton count
Mass number: Protons plus neutrons
Ionic bond: Electron transfer
Covalent bond: Electron sharing
Homologous series: Same functional group

Series vs Parallel Circuits

Series

Same current
Voltage divides
Resistance adds

Parallel

Same voltage
Current divides
Reciprocals add

Series current; parallel voltage

Life Science Core

Nucleus: Stores genetic material
Mitochondria: Produces cellular ATP
Ribosome: Builds proteins
Chloroplast: Performs photosynthesis
Xylem: Moves water upward
Phloem: Transports food
Alveoli: Exchange respiratory gases
Nephron: Kidney functional unit
Insulin: Lowers blood glucose
Reflex arc: Rapid neural pathway
Genotype: Allele combination
Phenotype: Observable trait
Dominant allele: Expressed in heterozygote
Food chain: One-way energy flow
Decomposer: Recycles nutrients

Acid vs Base

Acid

pH below seven
Turns blue litmus red
Provides hydrogen ions

Base

pH above seven
Turns red litmus blue
Provides hydroxide ions

Acid H+; base OH−

Operation Order

Brackets Orders Division Multiplication Addition Subtraction

Brackets firstPowers nextDivide and multiplyAdd and subtract

HCF vs LCM

HCF

Largest common divisor
Grouping questions
Never exceeds inputs

LCM

Smallest common multiple
Repeating event questions
At least largest input

Grouping HCF; cycles LCM

Arithmetic Method Picker

Part and whole given→Percentage formula
Successive percentage changes→Multiply change factors
Cost and sale given→Profit-loss base CP
Marked and sale given→Discount base MP
Principal rate time given→Interest formula
Ratio and total given→Proportional shares
Workers combine→Add work rates
Pipe drains→Subtract drain rate
Objects move together→Relative speed
Train crosses object→Total crossing length

Arithmetic Core

Percentage: Part ÷ whole × 100
New value: Old × (1 ± rate/100)
Profit: SP − CP
Profit percent: Profit ÷ CP × 100
Loss percent: Loss ÷ CP × 100
Discount: MP − SP
Discount percent: Discount ÷ MP × 100
Simple interest: PRT ÷ 100
Compound amount: P(1 + r/100)^t
Average: Total ÷ count
Ratio share: Total × part ÷ sum
Direct proportion: Both change together
Inverse proportion: Product stays constant
Two-number HCF × LCM: Product of both numbers

Distance Triangle

Distance equals Speed times Time

D = S × TS = D ÷ TT = D ÷ S

Simple vs Compound Interest

Simple

Original principal base
Equal yearly interest
PRT divided 100

Compound

Growing amount base
Interest earns interest
Use power factor

Fixed base vs growing base

Work, Pipes, and Motion

Work rate: 1 ÷ completion time
Combined work: Add individual rates
Two-worker time: xy ÷ (x + y)
Pipe net rate: Fill rates minus drains
Speed: Distance ÷ time
Distance: Speed × time
Opposite motion: Add speeds
Same direction: Subtract speeds
Downstream speed: Boat + stream
Upstream speed: Boat − stream
Train crossing: Total length ÷ relative speed
km/h to m/s: Multiply 5/18
m/s to km/h: Multiply 18/5

Algebra and Mensuration

Square identity: (a+b)²=a²+2ab+b²
Difference square: a²−b²=(a−b)(a+b)
Rectangle area: Length × breadth
Triangle area: Base × height ÷ 2
Circle area: πr²
Circumference: 2πr
Cuboid volume: l × b × h
Cylinder volume: πr²h
Cone volume: πr²h ÷ 3
Sphere volume: 4πr³ ÷ 3
Pythagoras: a² + b² = c²
Mean: Sum ÷ observations
Median: Middle ordered value
Mode: Most frequent value

Constitution Parts

Rights Three; Principles Four; Duties Four-A

Rights: Part IIIDPSP: Part IVDuties: Part IVA

Rights vs Duties

Fundamental Rights

Part III
Judicially enforceable
Protect individual freedoms

Fundamental Duties

Part IVA
Article 51A
Citizen responsibilities

Rights enforce; duties guide

Official CBT Mechanics

Question type: Objective multiple choice
CBT stages: Single; multi-stage option reserved
Total questions: 100 nominalOfficial
Total marks: 100
Standard time: 90 minutes
Eligible extra time: 120 minutes
Correct answer: +1 mark
Wrong answer: −1/3 mark
Unanswered: No deduction
Section counts: Indicative, may varyKey caveat
Tentative CBT window: August 3–21, 2026
City-date link: About 10 days before
E-call letter: About 4 days before
Entry identity: Original or e-verified Aadhaar
Calculators: Not permitted

Static vs Current Awareness

Static

Stable foundational facts
Polity and geography
Revise spaced notes

Current

Recent dated events
People and outcomes
Refresh official sources

Stable facts vs dated events

Selection and PET Rules

UR minimum: 40%
EWS minimum: 40%
OBC-NCL minimum: 30%
SC minimum: 30%
ST minimum: 30%
PwBD shortage relief: Up to 2 marks
Multi-shift CBT: Percentile-equivalence normalization
PET shortlist: About 3× vacanciesRatio may vary
PET result: Qualifying only
Male carry: 35 kg, 100 m, 2 min
Female carry: 20 kg, 100 m, 2 min
Male run: 1 km, 4:15
Female run: 1 km, 5:40
Transgender PET: Female standards
PET exemptions: PwBD, CCAA, ExSM
DV shortlist: 1:1 vacancies
Final stages: DV then medical

Polity and Modern History

Constitution commenced: 26 January 1950
Fundamental Rights: Part III
Directive Principles: Part IV
Fundamental Duties: Part IVA
President: Constitutional head
Prime Minister: Heads government
Lok Sabha: Directly elected house
Rajya Sabha: Permanent upper house
Money Bill: Introduced in Lok Sabha
Supreme Court: Apex judicial court
CAG: Audits public accounts
Election Commission: Conducts public elections
INC founded: 1885
Swadeshi movement: 1905
Non-Cooperation: 1920
Civil Disobedience: 1930
Quit India: 1942
Independence: 15 August 1947

Geography and Economy

Tropic of Cancer: About 23.5° N
Standard meridian: 82.5° E
Monsoon: Seasonally reversing winds
Alluvial soil: Northern plains dominant
Black soil: Suited for cotton
Western Ghats: Western coastal highlands
GDP: Domestic final output
Inflation: General price rise
RBI: Monetary authority
Repo rate: RBI lends banks
Fiscal policy: Government taxes and spending
Primary sector: Natural resource activities
Secondary sector: Manufacturing activities
Tertiary sector: Service activities

Current Affairs Capture Map

Science technology: Mission, agency, outcome
Sports: Event, venue, winner
Culture: Festival, state, recognition
Personalities: Role, work, honour
Economics: Policy, institution, measure
Politics: Office, body, decision
International: Country, summit, outcome
Revision record: Who, what, when, where

Common Traps

Treating counts as fixed

Official distribution is indicative ≠ Actual sections may vary

Ignoring negative marking

Wrong answer costs one-third ≠ Avoid unsupported guesses

Using the wrong base

Profit uses cost price ≠ Discount uses marked price

Adding percentage changes

Successive changes multiply ≠ Reversal needs different percentage

Forgetting unit conversion

Match distance and time ≠ Convert before substituting

Assuming syllogism existence

Universal claims imply no existence ≠ Draw only required overlap

Confusing mass and weight

Mass uses kilograms ≠ Weight uses newtons

Reversing circuit rules

Series keeps current ≠ Parallel keeps voltage

Memorizing stale current affairs

Attach dates to events ≠ Refresh from official sources

Treating PET as scored

PET is qualifying ≠ Normalized CBT drives merit

Last Minute

1.Remember 100 questions
2.Budget 90 minutes
3.Keep one-third penalty visible
4.Treat section counts indicative
5.Recheck percentage bases
6.Convert units before formulas
7.Draw Venn diagrams minimally
8.Split alternating series
9.Review Class 10 science
10.Refresh dated current affairs
11.Skip long first-pass items
12.Revisit marked questions
13.Verify negative wording
14.Check official RRB updates

RRB Group D (Level 1) Computer-Based Test

Practice Questions120 questions Study Guide Cheat Sheet Flashcards50 cards

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