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Study notes

Formulas, rules and shortcuts — topic by topic.

Short, exam-focused notes with solved examples. Read one, download it as a PDF, then practise the topic on the real exam screen.

General Intelligence and Reasoning

AnalogyNumber, letter, word and meaning-based analogy types, common word relationships and a sentence method for SSC…

3 min readPractise

Blood relationsHow to draw a family tree, relation words you must know and coded relation questions, with…

2 min readPractise

ClassificationHow to spot the odd one out in number, letter and word groups, which properties to…

3 min readPractise

Coding-decodingLetter position values, opposite letters, shift and reverse codes, and a step-by-step method for SSC coding…

2 min readPractise

Cube and diceRules to find opposite faces from dice views and nets, standard dice facts, and painted cube…

3 min readPractise

Direction senseThe eight directions, left and right turns, shortest distance with Pythagoras, and shadow questions at sunrise…

1 min readPractise

Mathematical operationsHow to replace symbols, apply BODMAS correctly after an interchange, and test sign-swap options quickly in…

3 min readPractise

Mirror and water imageHow mirror and water images flip, which capital letters stay the same, the clock rule and…

3 min readPractise

Missing numberCommon row, column, triangle and circle patterns for missing number questions, an order of checks and…

3 min readPractise

Paper folding and cuttingHow layers double with each fold, how to unfold step by step using symmetry, and cuts…

3 min readPractise

Seating arrangementLeft and right rules for rows and circles, facing the centre or outside, a step-by-step method…

3 min readPractise

SeriesDifferences, squares, cubes, primes, alternating and ×+ patterns, plus letter series, with a quick checking order…

2 min readPractise

SyllogismAll, some and no statements, drawing the minimum Venn diagram, and the possibility and either–or cases…

2 min readPractise

Venn diagramHow to show relationships between groups with circles, typical sets asked in SSC, and formulas for…

3 min readPractise

Word arrangementRules for arranging words in dictionary order, handling common prefixes, and putting words in a meaningful…

3 min readPractise

General Awareness

Art and cultureClassical and folk dances with their states, festivals by state, folk paintings, music maestros and famous…

3 min readPractise

BiologyCell organelles, human body systems, vitamin deficiency table, ABO blood groups and diseases sorted by bacteria,…

3 min readPractise

ChemistryStates of matter, atomic structure, a table of common chemical names and formulas, acids, bases and…

4 min readPractise

GeographyOrigins of Indian rivers, Himalayan passes, soil types, famous national parks, world records and the layers…

3 min readPractise

EconomyNational income concepts, types of inflation, fiscal vs monetary policy, repo, CRR and SLR, five-year plans…

4 min readPractise

HistoryIndus sites, Vedic texts, Mauryas and Guptas, Sultanate and Mughal order, key battles and the 1857–1947…

4 min readPractise

PolityMaking of the Constitution, parts and schedules, must-know articles, President and Parliament basics, and the amendments…

3 min readPractise

PhysicsSI units table, Newton's laws, reflection and refraction, sound facts, basic electricity and a list of…

4 min readPractise

SportsPlayers per team, trophies and the sports they belong to, common sports terms, measurements, national sports…

3 min readPractise

Static GKIndia's national symbols, firsts in India, a table of important days and the headquarters of major…

4 min readPractise

Quantitative Aptitude

AlgebraSquare and cube identities, a³ + b³ + c³ − 3abc, x + 1/x results, linear…

2 min readPractise

AverageAverage of consecutive numbers, adding or removing a member, wrong entries and average speed.

1 min readPractise

Compound interestAnnual, half-yearly and quarterly compounding, the CI − SI difference for 2 and 3 years, and…

1 min readPractise

Data interpretationHow to read tables, bar and line graphs and pie charts fast, with the percentage, ratio…

3 min readPractise

DiscountMarked price and selling price, single equivalent of successive discounts, buy x get y free offers…

2 min readPractise

GeometryLines and angles, triangle centres, congruence and similarity, Pythagorean triplets, quadrilaterals and circle theorems for SSC.

3 min readPractise

HCF and LCMPrime factorisation and division methods, the HCF × LCM rule, HCF and LCM of fractions and…

1 min readPractise

Heights and distancesAngles of elevation and depression, the 30°, 45° and 60° triangles, two-observer setups and ready results…

3 min readPractise

MensurationArea, perimeter, volume and surface area for every shape SSC asks about, in one printable sheet.

2 min readPractise

Number systemTypes of numbers, divisibility tests from 2 to 11, remainder rules, unit digit cycles, sum formulas…

2 min readPractise

PercentageFraction–percent table, successive change, population and depreciation, and the shortcuts that save time in SSC questions.

2 min readPractise

Profit and lossCost price, selling price, marked price, successive discounts and dishonest dealer questions explained with SSC-style examples.

2 min readPractise

Ratio and proportionCombining ratios, dividing in a ratio, mean and third proportional, and partnership profit sharing.

1 min readPractise

Simple interestThe one SI formula, how to find rate, time and principal, and the "amount doubles" questions…

1 min readPractise

SimplificationThe VBODMAS order, laws of indices, surds and rationalising, recurring decimals and approximation tricks for SSC.

2 min readPractise

Time and workThe LCM (total work) method, working together, men-days formula and pipes and cisterns, with SSC examples.

1 min readPractise

Time speed and distanceUnit conversion, relative speed, trains crossing poles and platforms, and boats and streams, with solved examples.

1 min readPractise

TrigonometryStandard angle values, the three identities, complementary angles and the tricks SSC questions are built on.

1 min readPractise

English Comprehension

Active passive voiceHow the verb changes in each tense, pronoun changes, modals and imperative sentences, with SSC examples.

1 min readPractise

AntonymsHow to find opposites quickly, avoid synonym traps and use prefixes, with a list of 40…

3 min readPractise

Cloze testHow to read a cloze passage, use grammar and meaning clues, spot collocations and check your…

4 min readPractise

Direct indirect speechReporting verbs, the backshift of tenses, pronoun and time word changes, and questions and commands in…

2 min readPractise

Error spottingSubject–verb agreement, tenses, pronouns, articles, prepositions and degrees of comparison, with wrong and right sentences for…

4 min readPractise

Fill in the blanksGrammar and vocabulary clues for single-blank questions, fixed prepositions and conjunction pairs that SSC tests often.

3 min readPractise

Idioms and phrasesHow to work out idiom meanings in SSC questions, plus a table of 40 frequently tested…

4 min readPractise

One word substitutionA grouped list of 50 one word substitutions for people, places, government, sciences and killing, with…

3 min readPractise

Para jumblesHow to find the opening sentence, use pronouns and connectors, spot mandatory pairs and order jumbled…

3 min readPractise

Reading comprehensionA reading strategy for SSC passages, how to handle main idea, inference, tone and vocabulary questions,…

4 min readPractise

Sentence improvementA four-step method for sentence improvement questions and the grammar patterns SSC tests most, with corrected…

4 min readPractise

Spelling correctionSpelling rules for ie/ei, doubling consonants, -able/-ible and silent letters, plus 30 commonly misspelt words for…

3 min readPractise

SynonymsHow to choose the closest meaning, avoid look-alike traps and use context, with a list of…

3 min readPractise

56 notes so far. New topics are added every week.