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Simple Math Tricks for Faster Computations   1. Add or Subtract 2 or 3 Digit Numbers To add numbers that aren’t already a multiple of ten or one hundred, round the number to the nearest tens or hundreds digit, add, and then add or subtract by the number you rounded off. Do the opposite when subtracting. Examples: 144 + 48 = 144 + 50 – 2 = 192 1385 – 492 = 1385 – 500 + 8 = 893 2. Multiply Numbers Between 11 & 19 To multiply two numbers that are between 11 and 19, add the ones digit of one number to the other number, multiply by 10, and then add the product of the ones digits. Example: 14 × 13 = (17 × 10) + (4 × 3) = 182   3. Square Any Number Between 11 & 99 To square any number n, first find the nearest multiple of 10 and find out how much you would have to add or subtract (k) to get to that number. Then do the opposite function (addition or subtraction) to get two numbers that average out to n (i.e. n + k and n – k). Multip...

Critical Reasoning in GMAT One of the section included in GMAT is Critical Reasoning. There are certain types of questions and in order to solve those questions, the technique followed is:- 1.       Always read question prior reading to an argument. 2.      Also, analyze the type of question before solving these questions. Types of Question There are roughly 7 types of question. 1.       Assumption Questions:- These questions ask students to identify the unstated piece information that must be true for the author’s evidence to lead to their conclusion.  Remember, that the right answer will be information, that if it were not true, would cause the author’s argument to no longer make sense. 2.      Strengthen Questions :- Strengthen questions require an answer choice that makes the argument more likely to be true.  You want to find a new piece of evidence that ...