If the following questions make you uncomfortable, then read this article. In how many ways can 5 member committee be formed out of 20 students? Or How many ways can the word “UPSC” be arranged so that “U” is always second from left. In [...]
Q. How many ways can four children be made to stand in a line such that two of them A and B are always together? (-asked in UPSC Prelims 2010) Confused? You won’t be, after reading this. DONOT Proceed further, without reading The First article on [...]
Main-Topic: Time, Speed Distance (TSD) Subtopic: Trains and Platforms. you’ll be given some data and asked to find the length of railway platform or speed of train etc. Visualizing the Concept: Train and Pen Case 1: One Train One Man (or Tree, Pole) Case 2: One [...]
Introduction Case1 : Probability of Particular Actor getting selected Case 2: Probability of One lady getting selected Case 3: One man and one woman (“AND” case) Case 4: “Atleast” one man is selected (“OR” case) Alternative method: 1 Minus Case 5: Probability of [...]
When you form words using alphabets (or letters), the ‘order’ matters. Three alphabets T,A,C Now you form words: CAT is not same as ACT; both words have different meanings hence order matters. This is a permuation problem. Case 1: All letters are different Case 2: Word [...]
Rule #1: Maintain a Diary of Mistakes Rule #2: Get your hands “DIRTY” Rule #3: Know when to give up the fight. The Mock-test “SERIES” for CSAT Previous Articles on Aptitude Rule #1: Maintain a Diary of Mistakes Consider this equation x-33=(17/2) =>2x -33 =17 =>2x=17+33 =>2x=50 hence x=25. Wrong! [...]
Easy Wine and Water Mixing Problem Two Solutions: Selling Price of Wine and Profit Dilution by adding Water in the Wine Average Profit / Interest Rate: Jethalal’s Mobile shop Average weight of Group : Gokuldham society’s case Recommended Booklist Previous Articles Introduction Mixture, Alligation [...]
Case#1: Basics Case 2: Time same but Different distance covered in each case Case #3: unknown variables Previous Articles I hope you’ve mastered the STD table method from earlier articles on Time and Work / Pipes and Cistern. We can use that STD method even [...]
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 [...]
Introduction Circular arrangement Step 1: Draw the diagrams Step 2: Run the Checklist Step 3: Proceed with questions Introduction There are 4 types of ‘Logical-Arrangement’ questions Circular : Sitting In a Round Table Linear : Sitting in rectangular table or row Traits: List of people [...]
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 [...]
Case 1: Two partners join @same time Step 1: Fill up the table Step 2: Find Ratio of Actual investment Step 3: Componendo on Total Profit Case 2: Two Partners join @Different Time Step 1: Fill up table Step 2: Find Ratio of [...]
© Copyright 2015. All Rights Reserved. The #1 Free Online Courses and Education Portal.
