[Aptitude] TSD: Average Speed made easy without Formulas (Our Good ol’ STD-Table Method!)

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If you’ve mastered the STD table method for Time n Work my previous articles, then Average speed is a piece of cake. Absolutely No need to mugup any formula for average speed. Case 1: Distance covered in two phases Approach #1: Good ol’ STD Table Step1: Fill up all cells of STD Table Step2: Addition Approach #2: Alligiation method Case … Read More


[Aptitude] Family Trees & Blood Relations: Logical Arrangement Made Easy

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Introduction Dataset #1 Step 1: Gender and Generation table Step 2: Checklist Questions based on the Family-Data Dataset #2: UPSC CSP’2000 Step #1: Gender and Generation table Step-2: Run the checklist Step-3: Solve the Question Do eliminate wrong options Keep a Watch on the Watch Previous Articles on Aptitude Introduction Family relation / Family tree / Bloodline related aptitude questions … Read More


[Aptitude] Compound Interest Rate, Population Growth without Formulas

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Introduction Case: City’s population: Growth Case: City’s Population: Decline Case: Bank’s compound interest rate(CI) Case: CI →Finding Nemo Principal Case: Compounding Twice a Year Case: Compounding thrice a year Case: Wine Replacement (Adulteration) Approach 1: Alligiation loop   Approach #2: Compound Interest Case: Adulteration→Finding Original volume Case: Simple interest rate (SI) Case: SI→ Finding Principal Practice Questions for CI/SI Sidenote … Read More


[Strategy] Five Rules: How to prepare for UPSC without leaving job?

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Rule #2: You’ve to stop feeling guilty about it Rule #3: You’ve to study in minutes, not in hours Rule #4: “Net-surfing” doesn’t equal to “studying” Rule #5: You’ve to do “follow up” instantly Rule #1: Rule #2: You’ve to stop feeling guilty about it When you think of the word ‘study’, you think of an “activity of reading books … Read More

Indian History Freedom Struggle Pratik Nayak