One Click Prep | Sujoy Kumar Datta

How to solve Removal and replacement questions We often get questions involving  removal and replacement of mixtures where a part of a mixture is removed and replaced by some other solution. Say, a vessel contains different constituents in some given ratio. A fraction of the solution is removed and some quantity of some constituent is added to the solution. This process is repeated multiple times and the final ratio of constituents in the mixture has to be determined. Though this looks very complicated, we can solve it simply, in fact, in a single line! We just need to understand the fact that if a fraction,  f  of the solution is removed, the same fraction of each constituent also gets removed, and hence, the fraction  (1-f)  of each constituent is left, and as a result, after removal, the ratio of the constituents remains unchanged. This is very easy to understand. Say, you have a sugar solution in a glass and you drink a part of it. The remaining part would t...

Percentage & Percentage change Percent (read as per cent) means ‘every hundred’, or, essentially, ‘out of 100’. If we are given a fraction, we can simply convert it to a percentage by multiplying 100. Say, we have ½, which, when multiplied with 100 becomes ½ x 100 = 50%. What do we mean by a percentage change? Say, a person has 20 chocolates. If his number of chocolates is increased by 10%, what does it mean? First of all, let us see what is doesn’t mean: after the increase, the number of chocolates with him is  NOT  20 + 10 = 30, nor is it 20 +  10 / 100  = 20.1 When we talk of a percent increase, we must understand on what  BASE VALUE  is the percentage change working on. In this case, obviously, the 10% increase is 10% of the number of chocolates he has, i.e. 20. Thus, the number of chocolates with him would become: 20 + 10% of 20 = 20 + 20 x  10 / 100  = 22 Observe that:  20 + 20 x  10 / 100  = 20 x (1 +  10 / 100 ) = 2...

GMAT Quant – Ten points to keep in mind The Graduate Management Admission Test (GMAT) is a computer adaptive test taken for entry into top management programs worldwide. It is intended to assess the student’s ability in the Verbal Ability and Quantitative Aptitude along with writing and data analysis skills. Being adaptive in nature, the test puts forward questions depending on the solving accuracy of the candidate in previous questions. The questions are also tricky, enticing a candidate to make inadvertent mistakes. We have listed down ten  most important strategies to follow while tackling the quant section of the GMAT – we have also solved some questions to drive the point home. Before going through the solutions, try to solve the questions and then verify the approach with the explanations provided.  Do not make assumptions while solving a problem As already mentioned, most GMAT questions have some trick element which is often overlooked by the students. Also, the wording...

Vocabulary for the GRE In the GRE, vocabulary plays a very important role. The Verbal Reasoning section contains a wide range of words. These are some of the words that are most commonly used in native-English speaking countries. You will need a strong vocabulary to be able to answer questions on Reading comprehension – to be able to comprehend passages on a wide range of complex topics Text Completion and Sentence Equivalence – these questions directly test your vocabulary in context in the GRE are vocabulary based. To complicate matters, there are so many GRE vocabulary lists available – some with 300 words while some with 1000. But the question is – How does one remember so many words? Is it possible to remember all the words and that too, in context? A decent strategy We can follow the following steps: Try to understand the roots of words instead of memorizing the words themselves – that way, you can try to make out a meaning of the word even if you aren’t familiar with that word. ...

CAT 2025 – a 9 month journey Expected format of CAT 2025 How to prepare for CAT 2025 With another 9 months left for CAT 2025 (expected to be held towards the end of November), how should you start your preparation? We know that the CAT tests skills in three areas – Quantitative Aptitude, Logical reasoning & Data Interpretation, and Verbal Ability. Thus, to excel in this test, you need to devote time equally to each of the three areas. How to effectively do that is what we will discuss. Take stock of the situation Those who have already started preparing for CAT 2025 sometime back, would be aware of exactly what sort of skills are required to excel in these three areas. They would also be aware about which area they are particularly weak in. Needless to say, you need to devote the major part of your preparation to overcome your weaknesses. However, those who have decided to start just now for CAT 2025, don’t worry! You are not late in starting your preparations. But, first you need ...

  GMAT & GRE Time Management Strategies Well, this article is kind of an antithesis, really. Students focus a lot on what the correct  time management strategies  for a test like the GMAT or GRE should be. And why do students focus on a strategy? The answer is simple – these are  timed  tests. Had it not been so, there would not have been any talk about strategy. But let us pause for a moment and try to answer this question:   “If the concepts are themselves weak, can a test-taking strategy help?” So, we start with the most important part of time management strategies –  concepts ! 1. Get your concepts right I understand that it isn’t that easy for everyone to learn all concepts of Quantitative and Verbal and excel in that. I am not asking anyone to do that either.  All I am saying is make sure that you go through the different topics and try to learn all the “ basic concepts ” properly – at least this will help you to understand the diff...