Prachi's Blog

Practical notes and routines for students studying Accountancy, Economics, and Business Studies across CBSE, ISC, and State Board.

A ceramic wave floats above glass layers showing matching hills and an opposing crest and hollow

Symmetric vs Skew-Symmetric Matrices: Tests and Decomposition

Learn to identify symmetric and skew-symmetric matrices, solve missing-entry questions, avoid product traps, and decompose a matrix with worked examples.

12th

An amber pearl travels down a brass track beside a teal glass track displaced from its faint original position

Movement Along a Demand Curve vs Shift: The Cause Test

Tell demand movements from shifts with labelled diagrams, worked schedules, related-goods examples, and a simple cause test for tricky questions.

11th
12th
Economics

A bridge woven from roots connects newly sown fields to a golden harvest across a stream

Rural Credit in India: Need, Purpose, and Sources

Understand rural credit, institutional and non-institutional sources, NABARD, SHGs, and Kisan Credit Cards with worked examples and practice answers.

12th
Economics

A fruit-bearing tree grows from a floating island with visible roots and hanging stone weights, beside a separate crystal island under glass

Capital Employed for Goodwill: What to Include and Exclude

Calculate capital employed for goodwill with an asset checklist, liability rules, investment adjustments, and a solved balance sheet checked both ways.

12th
Accounts

A prism corrects an extra disc and a missing disc in two shadow stacks while the original counting objects remain intact

Overcasting and Undercasting: Subsidiary Book Rectification

Understand all eight subsidiary book casting errors with journal entries, a balanced Suspense Account, profit adjustments, and solved practice questions.

11th
Accounts

Separate clay columns, adjoining glass blocks, and a thread tracing a peak represent three ways of seeing data

Bar Diagram vs Histogram vs Frequency Polygon: Which to Use?

Choose the right graph for your data with solved examples, clear diagrams, unequal class intervals, class boundaries, and frequency polygon steps.

11th
Economics

A ribbon bends through a paper valley beside separated terraces and rising steps

Modulus, Signum, and Greatest Integer Graphs: Break Points

Learn modulus, signum, and greatest integer graphs with clear diagrams, open and filled dots, negative inputs, shifted graphs, and solved questions.

11th
12th

A fixed brass loom weaving its widest cloth at a balanced rhythm before excess shuttles tangle the threads

TP, AP, and MP From a Schedule: Find the Three Stages

Learn to calculate total, average, and marginal product, read their curves, and identify all three stages of production from a schedule.

12th
Economics

A glowing three by three brass lock opening as nine tiles rotate into a mirrored key

Inverse of a 3 by 3 Matrix by Adjoint: Signs, Steps, and Checks

Learn the adjoint method for a 3 by 3 matrix with a cofactor sign map, one complete example, verification, and practice questions.

12th
Study Advice

A luminous object gaining a new coloured layer at each production stage before being balanced against those contributions

Double Counting in National Income: Final Goods and Value Added

Learn how to identify final and intermediate goods, avoid double counting, and solve value-added method numericals with clear steps.

12th
Economics

Luminous islands connected by complete two-way paths across a dark ocean

Reflexive, Symmetric, and Transitive Relations Made Simple

Learn how to test reflexive, symmetric, transitive, and equivalence relations using clear checklists, counterexamples, and solved questions.

12th

A glowing path crossing a translucent plane while a compass needle stands perpendicular to it

Lines and Planes in 3D: Cartesian and Vector Forms Made Simple

Learn how to convert 3D lines and planes between Cartesian and vector forms, read direction and normal vectors, and check every answer.

12th

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