https://7solve.7by.in/blog/Chapter guides, solved examples and exam prep for Indian students.en-inhttps://7solve.7by.in/blog/active-recall-the-study-method-that-actually-workshttps://7solve.7by.in/blog/active-recall-the-study-method-that-actually-worksThu, 17 Sep 2026 03:30:00 GMTWhy re-reading feels productive and is not, what active recall is, exactly how to do it for maths, science and theory subjects, and how to tell within a week that it is working.Study Tipshttps://7solve.7by.in/blog/arithmetic-progressions-formula-sheethttps://7solve.7by.in/blog/arithmetic-progressions-formula-sheetThu, 17 Sep 2026 03:30:00 GMTThe AP formulas for Class 10 — nth term, sum of n terms, nth term from the end, three-term tricks — each with when to use it, a worked line, and the mistakes that cost marks.Formula Sheetshttps://7solve.7by.in/blog/cbse-class-10-boards-important-topicshttps://7solve.7by.in/blog/cbse-class-10-boards-important-topicsThu, 17 Sep 2026 03:30:00 GMTThe chapters that carry the marks in CBSE Class 10 Maths and Science — with the unit-wise weightage, the question types each chapter turns into, and a revision order for the last two months.Board Examshttps://7solve.7by.in/blog/chemical-bonding-explained-with-examples-class-11https://7solve.7by.in/blog/chemical-bonding-explained-with-examples-class-11Thu, 17 Sep 2026 03:30:00 GMTIonic, covalent and coordinate bonds, Lewis structures, VSEPR shapes, hybridisation and molecular orbital theory for Class 11 — each with the examples examiners use and the rules for predicting shape.Chapter Noteshttps://7solve.7by.in/blog/difference-between-debit-and-credithttps://7solve.7by.in/blog/difference-between-debit-and-creditThu, 17 Sep 2026 03:30:00 GMTDebit vs credit explained without the confusion — what each does to assets, liabilities, capital, income and expenses, with a table, a memory rule and worked entries.Chapter Noteshttps://7solve.7by.in/blog/difference-between-list-and-tuple-in-pythonhttps://7solve.7by.in/blog/difference-between-list-and-tuple-in-pythonThu, 17 Sep 2026 03:30:00 GMTList vs tuple in Python compared — mutability, syntax, speed, memory, methods, when to use which — with runnable examples and the Class 12 exam questions on it.Chapter Noteshttps://7solve.7by.in/blog/difference-between-mitosis-and-meiosishttps://7solve.7by.in/blog/difference-between-mitosis-and-meiosisThu, 17 Sep 2026 03:30:00 GMTMitosis vs meiosis compared in a table — number of divisions, daughter cells, chromosome number, crossing over, where each happens — and the questions examiners set on it.Chapter Noteshttps://7solve.7by.in/blog/difference-between-speed-and-velocityhttps://7solve.7by.in/blog/difference-between-speed-and-velocityThu, 17 Sep 2026 03:30:00 GMTSpeed vs velocity — scalar vs vector, distance vs displacement, when they are equal, and the round-trip and circular-motion examples that show why average velocity can be zero while average speed is not.Chapter Noteshttps://7solve.7by.in/blog/difference-between-stack-and-queuehttps://7solve.7by.in/blog/difference-between-stack-and-queueThu, 17 Sep 2026 03:30:00 GMTStack vs queue — LIFO vs FIFO, the operations, where each is used, a Python implementation of both, and the Class 12 and GATE questions that test them.Chapter Noteshttps://7solve.7by.in/blog/domain-and-range-of-functionshttps://7solve.7by.in/blog/domain-and-range-of-functionsThu, 17 Sep 2026 03:30:00 GMTHow to find the domain and range of any function, with the four cases that cover Class 11 and JEE questions and the mistakes that lose marks.Mathematicshttps://7solve.7by.in/blog/electricity-important-questions-class-10https://7solve.7by.in/blog/electricity-important-questions-class-10Thu, 17 Sep 2026 03:30:00 GMTThe important questions from CBSE Class 10 Electricity — Ohm's law, resistance, series and parallel, heating effect and power — solved with the working the marking scheme wants.Important Questionshttps://7solve.7by.in/blog/fundamental-rights-explainedhttps://7solve.7by.in/blog/fundamental-rights-explainedThu, 17 Sep 2026 03:30:00 GMTThe six Fundamental Rights (Articles 12–35) with what each article guarantees, the key cases and amendments, and the MCQ facts that competitive exams test every year.General Studieshttps://7solve.7by.in/blog/h2so4-propertieshttps://7solve.7by.in/blog/h2so4-propertiesThu, 17 Sep 2026 03:30:00 GMTThe physical and chemical properties of sulphuric acid — why it is a strong dibasic acid, a dehydrating agent and an oxidising agent — its manufacture by the Contact process, and the reactions exams ask.Chemistryhttps://7solve.7by.in/blog/how-to-build-a-mistake-bookhttps://7solve.7by.in/blog/how-to-build-a-mistake-bookThu, 17 Sep 2026 03:30:00 GMTA mistake book turns every wrong answer into a revision item with a reason attached. Here is what to write, how to classify mistakes, and how to revise the book so the same error never returns.Study Tipshttps://7solve.7by.in/blog/how-to-prepare-current-affairs-for-competitive-examshttps://7solve.7by.in/blog/how-to-prepare-current-affairs-for-competitive-examsThu, 17 Sep 2026 03:30:00 GMTA working method for current affairs — which sources, how far back, how to file each item so it becomes a question, and a weekly routine that fits around the static syllabus.Current Affairshttps://7solve.7by.in/blog/how-to-stop-silly-mistakes-in-mathshttps://7solve.7by.in/blog/how-to-stop-silly-mistakes-in-mathsThu, 17 Sep 2026 03:30:00 GMTSilly mistakes are not random — they come from six habits. Here is how to find which ones are yours, the checks that catch each one in five seconds, and a two-week plan to make the checks automatic.Study Tipshttps://7solve.7by.in/blog/how-to-write-answers-that-score-full-markshttps://7solve.7by.in/blog/how-to-write-answers-that-score-full-marksThu, 17 Sep 2026 03:30:00 GMTWhat examiners actually mark — the formula line, the labelled diagram, the stated unit, the reason after the fact — and how to present an answer so every mark that exists gets awarded.Study Tipshttps://7solve.7by.in/blog/jee-main-syllabushttps://7solve.7by.in/blog/jee-main-syllabusThu, 17 Sep 2026 03:30:00 GMTThe JEE Main syllabus for Physics, Chemistry and Mathematics listed chapter by chapter, with the chapters that carry the most questions in recent papers and how to order your preparation.Entrance Examshttps://7solve.7by.in/blog/journal-entries-explained-with-examples-class-11https://7solve.7by.in/blog/journal-entries-explained-with-examples-class-11Thu, 17 Sep 2026 03:30:00 GMTThe golden rules and the modern rules of debit and credit, then the 12 journal entries every Class 11 and CA Foundation student is tested on — each with the reasoning written out.Chapter Noteshttps://7solve.7by.in/blog/mole-concept-solved-exampleshttps://7solve.7by.in/blog/mole-concept-solved-examplesThu, 17 Sep 2026 03:30:00 GMTEight mole concept problems from Class 9 to Class 11 solved step by step — grams to moles, moles to particles, gas volumes at STP and limiting reagent.Important Questionshttps://7solve.7by.in/blog/neet-preparation-strategyhttps://7solve.7by.in/blog/neet-preparation-strategyThu, 17 Sep 2026 03:30:00 GMTA NEET preparation plan that fits the real syllabus — what to cover each month, how to split Biology, Physics and Chemistry, the NCERT rule, and how to use mocks and a mistake book.Entrance Examshttps://7solve.7by.in/blog/newtons-second-law-explainedhttps://7solve.7by.in/blog/newtons-second-law-explainedThu, 17 Sep 2026 03:30:00 GMTWhat Newton's second law really says, why F = ma is a special case, and five solved numericals from Class 9 to Class 11 with the units and vectors handled properly.Physicshttps://7solve.7by.in/blog/ohms-law-explained-with-exampleshttps://7solve.7by.in/blog/ohms-law-explained-with-examplesThu, 17 Sep 2026 03:30:00 GMTOhm's law stated properly, the V–I graph, when it fails, and six solved numericals covering series, parallel and resistivity for Class 10 and Class 12.Physicshttps://7solve.7by.in/blog/photosynthesis-in-higher-plants-notes-class-11https://7solve.7by.in/blog/photosynthesis-in-higher-plants-notes-class-11Thu, 17 Sep 2026 03:30:00 GMTClass 11 notes on photosynthesis in the order the chapter is taught — pigments, the light reaction, photophosphorylation, the Calvin cycle, C4 and CAM, and the limiting factors.Chapter Noteshttps://7solve.7by.in/blog/quadratic-equations-important-questions-class-10https://7solve.7by.in/blog/quadratic-equations-important-questions-class-10Thu, 17 Sep 2026 03:30:00 GMTThe 12 quadratic equations questions that keep coming back in CBSE Class 10 boards, solved step by step, with the method to use for each type.Important Questionshttps://7solve.7by.in/blog/recursion-explained-with-examples-collegehttps://7solve.7by.in/blog/recursion-explained-with-examples-collegeThu, 17 Sep 2026 03:30:00 GMTWhat recursion is, how the call stack unwinds, and five worked programs — factorial, Fibonacci, sum of digits, binary search, Tower of Hanoi — with the traces examiners expect.Chapter Noteshttps://7solve.7by.in/blog/trigonometric-functions-formula-sheethttps://7solve.7by.in/blog/trigonometric-functions-formula-sheetThu, 17 Sep 2026 03:30:00 GMTOne page of trigonometry formulas for Class 11 and JEE — ratios, identities, compound angles, multiple angles, sums to products — each with the situation it is for and a worked line.Formula Sheetshttps://7solve.7by.in/blog/how-to-study-effectively-with-aihttps://7solve.7by.in/blog/how-to-study-effectively-with-aiMon, 20 Jul 2026 03:30:00 GMTAI will not study for you — but used the right way it can double what you retain from every hour at your desk.Study Tipshttps://7solve.7by.in/blog/how-to-solve-maths-word-problemshttps://7solve.7by.in/blog/how-to-solve-maths-word-problemsFri, 17 Jul 2026 03:30:00 GMTWord problems feel hard because two skills are tested at once: reading and maths. Separate them and the fear disappears.Study Tipshttps://7solve.7by.in/blog/how-ai-doubt-solvers-workhttps://7solve.7by.in/blog/how-ai-doubt-solvers-workWed, 15 Jul 2026 03:30:00 GMTYou snap a photo, and seconds later a full solution appears. Here is what happens in between.Study Tips