Reasoning study notes
Free Reasoning notes for UPSC, SSC, banking and railway exams: every topic with the key facts, exam traps and a practice quiz. About 167minutes in all: read them in order, then take each topic's quiz to lock it in.
Number Series: Patterns & Tricks for SSC and Bank Exams
A step-by-step attack plan for number series: differences, ratios, squares and cubes, primes, mixed and alternating series, plus wrong-number-out.
Analogy: Notes for SSC CGL, CHSL & RRB NTPC
How to crack word, number and letter analogies: find the exact relationship in the first pair, then apply it. With the key relation lists exams reuse.
Classification (Odd One Out): Notes for SSC & RRB Exams
Find the odd one out fast: the properties examiners use for words, numbers, number pairs and letter groups, with a check-the-three method.
Letter, Alphanumeric & Semantic Series: Notes for SSC Exams
Letter positions, gap patterns, alternating and alphanumeric series, repeating-pattern blanks and logical word order. Methods with fresh worked examples.
Coding–Decoding: Notes for SSC CGL, CHSL & RRB NTPC
Every coding pattern SSC and RRB use. Letter shifts, opposites, reversal, number values, substitution and sentence codes. With a fast decoding routine.
Mathematical Operations: Notes for SSC & RRB NTPC
Symbol substitution, BODMAS order, sign interchange, choosing the right signs and hidden-rule operations. A clean method with worked examples.
Word Building, Jumbling & Dictionary Order: Notes for SSC & RRB
Dictionary order, forming words from a given word, jumbled words, anagrams and letter-position questions. Rules, checks and worked examples.
Venn Diagrams: Notes for SSC CGL, CHSL & RRB NTPC
Pick the right Venn diagram for any three groups, and solve two- and three-set counting problems with the union formula and region filling.
Drawing Inferences & Statement–Assumption: Notes for SSC
What an implicit assumption is, the negation test, typical notices and advertisements, and which if-then inferences are valid and which are traps.
Space Orientation, Mirror & Water Images: Notes for SSC
Mirror and water images of letters, words and clocks, dice opposite faces, painted-cube counting and rotation. Rules you can apply in seconds.
Paper Folding, Punched Holes, Embedded Figures & Counting: Notes
Layers and holes in folded paper, cuts on folds, embedded and completed figures, and quick formulas to count triangles, squares and rectangles.
Calendar, Clock, Indexing & Date Matching: Notes for SSC
Odd days and day-of-week method, repeating calendars, clock angle and coinciding-hands formulas, and a checklist for address, date and index matching.
Critical, Emotional & Social Intelligence and Problem Solving: Notes
How SSC situation questions are judged, the five parts of emotional intelligence, checking claims, and the classic puzzles behind problem-solving items.
Maps & Interpretation of Graphs: Notes for RRB NTPC
Map scales and conversions, directions and contour lines, and fast reading of tables, bar, line and pie charts. Percentage change, angles, averages.
Direction Sense: Notes for IBPS PO & SBI PO
Directions, left and right turns, shortest distance with Pythagoras, angle turns, shadow questions and renamed directions. One coordinate method for all.
Blood Relations: Notes for IBPS PO, SBI PO & RRB NTPC
Relation vocabulary, the family-tree method, pointing and introduction puzzles, coded relations and the gender trap. Explained with fresh examples.
Order and Ranking: Notes for IBPS PO & SBI PO
Every ranking formula you need. Total from both ends, rank conversion, people between, interchange, overlap cases and pass–fail counts. With worked examples.
Alphanumeric Series: Notes for IBPS PO & SBI PO
Position arithmetic, condition-counting scans, removing elements, and digit, letter and word rearrangement. The fast routines for bank-exam series sets.
Inequality: Notes for IBPS PO & SBI PO
How to combine inequality chains, when a conclusion follows, the either-or rule, coded inequalities and 'which expression is true'. With fresh worked examples.
Syllogism: Notes for IBPS PO, SBI PO & RRB NTPC
The four statement types, conversions, combination rules, possibility cases, 'only a few' and the either-or rule. With a Venn diagram routine for every set.
Seating Arrangement: Notes for IBPS PO & SBI PO
Linear and circular seating: left and right for every facing, parallel rows, mixed facing, and a step-by-step method to fix one valid arrangement.
Reasoning Puzzles: Notes for IBPS PO, SBI PO & RRB NTPC
Floor, flat and box puzzles, day and month scheduling, comparisons and two-attribute grids. A case-by-case method that always reaches the one valid answer.
Input–Output: Notes for IBPS PO & SBI PO
How to decode a machine's rule, write any step quickly, count steps correctly and avoid the usual traps in number, word and operation machines.
Data Sufficiency: Notes for IBPS PO, SBI PO & RRB NTPC
The five standard answer choices, the I-alone, II-alone, together routine, and how to judge sufficiency in reasoning and quant questions without solving fully.
Statement–Conclusion, Courses of Action & Decision Making: Notes for RRB NTPC
What makes a conclusion follow, how to judge a course of action, and how to solve eligibility-style decision questions. With clear rules and fresh examples.