CetKing

Variation describes the relation between two or more quantities. e.g. workers and work done, children and noise, entrepreneurs and start ups. More workers means more work done; more children means more noise; more entrepreneurs means more start ups and so on… These are examples of direct variation i.e. if one quantity increases, the other increases … Read more

A linear relation is one which, when plotted on a graph, is a straight line. In linear relationships, any given change in an independent variable will produce a corresponding change in the dependent variable, just like a change in the x-coordinate produces a corresponding change in the y-coordinate on a line. We know the equation … Read more

We all know that  Quant questions are of two types: Problem Solving and Data Sufficiency. But, if we look carefully, we will see a third type of question – combination of the two. There are a few statements given in them (like in Data Sufficiency questions) and five options to choose from (like in Problem … Read more

Knowing how to traverse through a paper is an important skill-set in the CAT. This is particularly true of the computer-based version, as in the paper-based versions one has luxury of choosing the order of the sections, sub-sections etc while attempting a paper. To be selective on choosing the questions in CAT helps one maximize … Read more

First, recall that the probability of x is the number ways x can occur/number of total possible outcomes (or p(x) = # desired/ # total). Another way to think about this equation is to see it as a ratio of two combinations or permutations. The number of ways x can occur is one combination (or … Read more

We know the divisibility rules of 2, 4 and 8: For 2 – If the last digit of the number is divisible by 2 (is even), then the number is divisible by 2. For 4 – If the number formed by last two digits of the number is divisible by 4, then the number is … Read more

Imagine you would have to solve 130,467 * 367,569. Without a calculator, we are surely entering a world of hurt. But we can see almost instantaneously what the units digit of this product would be. The units digit of 130,467 * 367,569 would be the same as the units digit of 7*9, as only the … Read more

Many students have a hard time understanding what makes a difficult question, difficult. They assume that the tougher questions are either testing something they don’t know, or that these problems involve a dizzying level of complexity that requires an algebraic proficiency that’s simply beyond them. Hard questions don’t ask you do to something you don’t … Read more

There is no restriction on how many tenses we can use and mix within a sentence, as long as they are appropriate for the context of the sentence. The problem is that sometimes the context can be a bit complicated to crack. We may think that a tense shift is required when it is actually not. Let’s take a … Read more