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Free Reasoning shorts

तर्कशक्ति · استدلال

23 topics, each a handful of cards plus practice questions with explanations. Free to read in full — no sign-up. Counts for TRE-4, BPSC PCS, CTET, RRB NTPC, SSC CGL, SSC CHSL, UP TET.

23 shorts · 184 practice questions

• Analogy, Classification and Odd One Out — Say the Sentence, Then Pickसादृश्यता, वर्गीकरण और विषम पद — पहले वाक्य बनाइए, फिर चुनिएAnalogy and odd-one-out together carry four to six marks in SSC and Railway papers, and they are pure method: say the relationship out loud as a sentence, keep its direction, then test each option against it. Add the eight relationship families, EJOTY for letter positions, the 27-minus rule for opposite letters, and the square-cube patterns for number analogy, and the whole set becomes mechanical.6 CARDS · 8 QUESTIONS
• Arithmetical Reasoning: Coins, Heads and Legs, Handshakes, Knockouts and the Trees Plus-One Ruleअंकगणितीय तर्क: सिक्के, सिर और पैर, हाथ मिलाना, नॉकआउट और पेड़ों का 'प्लस वन' नियमAssume-all-one-kind, then correct: the 60-second method for coin, hen-and-goat, handshake, knockout and tree-planting questions.6 CARDS · 8 QUESTIONS
• Blood Relations — Draw It, Don't Think Itरक्त संबंध — सोचिए मत, बनाइएBlood relation questions are free marks if you draw a diagram. Solve them in your head and you will get them wrong.6 CARDS · 8 QUESTIONS
• Calendar and Clock — Odd Days, Finding Any Date's Weekday and the 30H − 5.5M Angle Ruleकैलेंडर और घड़ी — विषम दिन, किसी भी तिथि का वार निकालना और 30H − 5.5M का कोण सूत्रOdd days: ordinary year 1, leap year 2, 100 years 5, 400 years 0 — enough to date 15 August 1947 to a Friday in five lines. Clocks run on one number, 5.5 degrees a minute, giving θ = |30H − 5.5M|, coincidence every 65 5/11 minutes, and 44 right angles a day. Two topics, two formulas, and no guessing.6 CARDS · 8 QUESTIONS
• Cause and Effect, and Strong vs Weak Arguments: The Relevance Testकारण और प्रभाव, तथा सशक्त बनाम कमज़ोर तर्क: प्रासंगिकता की कसौटीAsk 'why did this happen?' for cause and effect, and apply the relevance test to arguments: the two reasoning question types where one habit wins every mark.6 CARDS · 8 QUESTIONS
• Coding-Decoding — Four Question Types and the EJOTY Shortcutकोडिंग-डिकोडिंग — चार प्रकार के प्रश्न और EJOTY शॉर्टकटEJOTY for instant letter positions, 27 minus position for the reverse alphabet, and the intersection method that cracks sentence coding in four lines — the complete toolkit for coding questions in SSC, Railway, CTET and teacher-recruitment papers.6 CARDS · 8 QUESTIONS
• Counting Figures — Triangles, Squares, Rectangles and Straight Lines: the Formulas That Beat the Eyeआकृतियाँ गिनना — त्रिभुज, वर्ग, आयत और सरल रेखाएँ: वे सूत्र जो आँख से बेहतर गिनते हैंCounting triangles by staring at the figure is how marks are lost. Five formulas — grid rectangles, grid squares, polygon diagonals, lines through points, and size-class counting — turn the whole question type into arithmetic.6 CARDS · 8 QUESTIONS
• Cubes, Dice and Painted Cubes — The Four Counting Formulasघन, पासा और रंगे हुए घन — गणना के चार सूत्रFour formulas answer every painted-cube question ever set: corners are always 8, edges are 12(n−2), faces are 6(n−2)² and the hidden core is (n−2)³. Learn them once and stop imagining the cube.6 CARDS · 8 QUESTIONS
• Data Sufficiency — The Question Type Where Solving the Problem Is the Mistakeडेटा पर्याप्तता — वह प्रश्न-प्रकार जिसमें प्रश्न हल कर देना ही भूल हैData sufficiency does not ask for the answer. It asks whether the answer can be found. Cover one statement, judge the other, then judge them together — and never finish the arithmetic, because finishing is what runs the clock down.6 CARDS · 8 QUESTIONS
• Direction Sense — The Compass Method and the Shortest-Distance Formulaदिशा ज्ञान — दिशा-सूचक विधि और न्यूनतम दूरी का सूत्रThe eight directions in clockwise order, what a right or left turn actually does, the √(net NS² + net EW²) displacement formula with worked examples, the shadow rule, and the three traps that cost marks. Written for the reasoning sections of BPSC TRE-4, CTET, SSC CGL/CHSL, Railway NTPC and UPSC CSAT.6 CARDS · 8 QUESTIONS
• Input-Output (Machine) Reasoning — Crack the Hidden Rule in One Passप्रवेश-निर्गम (मशीन) तर्कशक्ति — एक ही चाल में छुपे नियम को पकड़ेंA machine takes a line of words or numbers and rearranges them, step after step. The question never states the rule — you find it by comparing Input to Step 1, then Step 1 to Step 2. Once you name the rule once, every step and every question about it falls out for free.6 CARDS · 8 QUESTIONS
• Letter, Alphanumeric and Mixed Series — the Alphabet-Position Methodअक्षर, अल्फ़ान्यूमेरिक एवं मिश्रित शृंखला — अक्षर-स्थान विधिA letter series looks like a memory test and is not one. Every one of them reduces to a single move: replace each letter with its position number, read the gaps as arithmetic, convert back. EJOTY gives you the anchors so you never count from A, and the opposite-letter rule — any letter plus its mirror equals 27 — settles a whole question type on its own. Four patterns cover nearly every series asked: constant skip, growing skip, two interleaved sub-series, and mirror pairs. Alphanumeric rows are lost on wording, not logic: 'followed by' means look right, 'preceded by' means look left. Worked examples throughout, with the off-by-one trap named.6 CARDS · 8 QUESTIONS
• Mathematical Operations, Symbol Substitution and Coded Inequality — Substitute First, Then BODMASगणितीय संक्रियाएँ, प्रतीक प्रतिस्थापन और कूटबद्ध असमिका — पहले बदलिए, फिर BODMAS लगाइएThree reasoning question types that look unrelated are one skill: replace every symbol with what it actually means, then apply BODMAS or the inequality chain rule. Rewriting the line before solving it is what separates a guaranteed mark from a careless loss.6 CARDS · 8 QUESTIONS
• Missing Number in Figures — Grids, Wheels and Triangles: Test Five Rules in Orderआकृतियों में लुप्त संख्या — ग्रिड, पहिए और त्रिभुज: पाँच नियम क्रम से जाँचेंMissing-number figures look like guesswork, but setters draw on only five rules — sums, products, squares and cubes, opposite pairs, and diagonal cross-products. Test them in a fixed order, accept a rule only when it fits every complete row, and these become the fastest marks in the reasoning section.6 CARDS · 8 QUESTIONS
• Non-Verbal Reasoning — Mirror Images, Water Images, Paper Folding and Embedded Figuresअशाब्दिक तर्कशक्ति — दर्पण प्रतिबिंब, जल प्रतिबिंब, कागज़ मोड़ना एवं छिपी आकृतियाँA mirror flips left and right. Water flips top and bottom. A fold acts like a mirror. Five sentences cover the whole of non-verbal reasoning — and four easy marks that most candidates hand back.6 CARDS · 8 QUESTIONS
• Number Series — The Six Patterns Behind Almost Every Questionसंख्या श्रेणी — लगभग हर प्रश्न के पीछे छह ही पैटर्नDifference row, ratio test, squares and cubes, climbing multipliers, alternating series and wrong-term questions — the fixed procedure that cracks number series in SSC, Railway, CTET and teacher-recruitment papers.6 CARDS · 8 QUESTIONS
• Puzzle Test — Floors, Boxes, Schedules and Comparisons: Build the Grid, Not the Storyपहेली परीक्षण — मंज़िल, बक्से, कार्यक्रम और तुलना: कहानी नहीं, ग्रिड बनाइएA puzzle set is four or five marks riding on one arrangement — solve it once and you bank the lot. Four steps, one grid, and three word-traps ('immediately above', 'between', and the direction you numbered the floors) decide whether you get all of them or none.6 CARDS · 8 QUESTIONS
• Ranking, Order and the Alphabet Test — Two Formulas That Kill the Off-by-One Errorक्रम, स्थान और वर्णमाला परीक्षण — दो सूत्र जो 'एक कम-एक ज़्यादा' की गलती मिटा देते हैंPosition from left + position from right = Total + 1, so Total = Left + Right - 1. That single minus one is the whole topic: the person is counted from both sides, so one seat is double-counted. Strictly between two positions is difference - 1; inclusive is difference + 1. For letters, reverse position = 27 - forward position, and EJOTY (E=5, J=10, O=15, T=20, Y=25) gets you anywhere in two steps. Same direction, subtract; opposite direction, add. Never subtract a from-left position from a from-right one without converting first.6 CARDS · 8 QUESTIONS
• Seating Arrangement — Linear Rows, Circles and the Left-Right Flipबैठक व्यवस्था — रैखिक पंक्ति, वृत्त और बाएँ-दाएँ का उलटावSeating puzzles are lost on one thing: which side is 'left'. Facing north your left is the west end; facing south it flips. Facing the centre of a circle your left is clockwise; facing outward it reverses. Learn the three position formulas, the fixed-clue-first method, and the exact traps SSC CGL/CHSL, Railway NTPC, BPSC TRE-4, CTET and UPSC CSAT set on rows, circles and two-row arrangements.6 CARDS · 8 QUESTIONS
• Sets and Venn-Diagram Counting — The Inclusion–Exclusion Rule for Two and Three Groupsसमुच्चय एवं वेन आरेख गणना — दो और तीन समूहों के लिए समावेशन-अपवर्जन नियमOverlapping-group questions are one formula, not a puzzle: add the groups, subtract every overlap you counted twice, add back the middle you removed too often. Two sets take one line; three sets take one line and a diagram filled from the centre outwards.6 CARDS · 8 QUESTIONS
• Statement & Conclusion, Assumption and Course of Action — The Verbal Reasoning Blockकथन एवं निष्कर्ष, पूर्वधारणा तथा कार्यवाही — तार्किक तर्कशक्ति का खंडFour question types, one discipline: answer only from the statement in front of you. Conclusions must necessarily follow, assumptions survive the negation test, courses of action must be practical and proportionate, and arguments must be relevant and significant. With the traps SSC CGL/CHSL, Railway NTPC, BPSC and UPSC CSAT set on each.6 CARDS · 8 QUESTIONS
• Syllogism — Believe the Statement, Not the Worldन्यायवाक्य — कथन पर विश्वास कीजिए, दुनिया पर नहींFour statement types, three legal conversions, and the either-or rule that rescues the questions where nothing seems to follow — the complete working method for syllogism in SSC, Railway and BPSC papers.6 CARDS · 8 QUESTIONS
• Word Arrangement in Reasoning: Dictionary Order, Same-Position Letters, Arrangement Count and Rankरीज़निंग में शब्द व्यवस्था: शब्दकोश क्रम, समान स्थान वाले अक्षर, व्यवस्था-संख्या और रैंकDictionary order, letters that keep their place after alphabetical sorting, the n!/(p!q!) arrangement count and word rank: the four word-based reasoning tools that SSC, Railway and TRE-4 mental-ability papers keep repeating.6 CARDS · 8 QUESTIONS