doing quick calculation indeed is an art, however, it can be acquired as well with consistent practice and persistence. When preparing for the MBA entrance exam, calculation is one tool that can help you achieve accuracy and precision in the exam. Therefore, candidates aiming for high scores in the exam must put the effort into improving their calculation speed. This skill will not only help you with time management in the exam but will also save you from the crisis of potential negative marking.
Considering all these challenges, it is a win-win situation if an aspirant brushes up calculation skills before appearing for any of the MBA entrance exams such as CAT, MAT, XAT, IIFT, SNAP, NMAT, SNAP, etc. as all of them carry a dedicated section of quantitative aptitude, comprising of not less than 25 questions. While there is time, you can develop your speed and a little hard work, time, practice, and passion is required in the whole exercise.
A good exercise or a list of certain problems would be great to have. So follow these tips and become a maestro of calculations to ace your upcoming MBA exam:
Yes, morning is the time, where you can work with the highest efficiency. Get up early in the morning; go for a walk first, so that you are completely fresh; then sit up and start your calculation practice. Well, it could be the same for some people who work at night as well; however, morning time is something that is preferable above all.
Now, when I mean when I say hierarchy, I mean start with the beginning. Go for calculations that are easy, then slowly proceed to the intermediate level, then to the advanced level. Start with as simple calculations as you can. Could be multiplying a three-digit number with a two-digit number, or adding three to five numbers of 4 digits each, or even something less than this level?
Now, set fixed schedules for practicing. Practice daily, at least for thirty minutes. I don't think that is too much. But yes, please don't settle at thirty minutes. Keep increasing your practicing duration. Keep a check on the speed daily. Set targets, try to accomplish the targets. In no circumstances, there shall be a drop from your previous ones. It is important to work out of your comfort zone, and when I say comfort zone here, I meantime. Say I can multiply 3265 with 33 in 65 seconds, next time I should try calculating 3652 with 52 in 62 seconds. Time, speed, and obviously accuracy do matter.
Now, what I mean is learn by heart the tables up to 20 at least, or 30. There is no end to learning. By heart those as you know "A to Z" or the table of two. Knowing tables simplify various questions involving multiplication, division, square, square roots, LCMs, HCFs, etc.
Now, this is really interesting. Why not use such numbers which you take out of the stuff that is interesting to you. Say, you are practicing finding the average of numbers, then why don't you chose this number out of an activity that is interesting; like finding the average score by Sachin Tendulkar at ODIs. Or if cricket is not your type, then go for your type of game, or could be anything else.
Though this does not work out in all the situations, it can be handy in a few situations. You could evaluate answers on the basis of options given, that too in case options are not alike (not ideal for descriptive papers). Say, you need to find what is 39657595*95863. Now, straight away cancel the options not having 0 or 5 in the unit place. With time and practice, you will be able to cancel the options at least.
Success does not have shortcuts, but it does have the alternative ways which could be shorter than one another.
Say 25*12=300, which could either be written as (25 * 10) + (25 * 2) = 250 + 50 = 300.
There are certain other methods which you could use. Probably tricks to solve the questions. You know with practice, you will be able to tailor some even. You could probably use Vedic mathematics techniques as well for the calculation.
Say, you need to find out: 45*11. Now, instead of multiplying it conventionally, go for the Vedic mathematics technique, explained below:
45 * 11= 4 ( 4 + 5 ) 5 = 495
35 * 11= 3 ( 3 + 5 ) 5 = 385
In the above example, what we have one is kept the tens digit and unit digit as it is and left a blank between them, which is the sum of both the numbers.
Another, such trick could be used for finding the square of numbers.
Let's say, we have a three digit number 166, which needs to be squared.
Step 1: Choose last two digits of 166, and add to the number:
166 + 66 = 232
Step 2: Multiply 100 with the result obtained above:
232 * 100 = 23,200
Step 3: Now multiply 66 with 66
66 * 66 = 4,356
Step 4: Now, add values from the step 2 and 3:
23,200 + 4,356 = 27,556
The result obtained is 27,556.
Some of us might be thinking it is a long method, but trust me with practice, you would find it is really short and does not involve any sort of complexities, thus making the task simpler.
I won't leave the concept of "comfort zone", till I get on being better than I am. Though I have explained in the very first point of hierarchy, that start with easy ones and move to tougher, I believe, this should not end. Even, nor does Mathematics numerals end. So keep challenging yourself to the toughest level, you can. Remember, it's not important what you start with, important in this case is what you end at. After a level, try calculating in mind. Do not use paper or pen. At first, it might be difficult but it really is not. The technique saves a lot of time as well. the mind works faster than your hands can.
CAT and Calculation Speed:
As we have already discussed above that there are 28 questions for quantitative aptitude, it becomes important for you to excel at calculation. The speed comes in importance when you know you have limited time to attempt these questions. Remember, you do the easy questions first. The questions which you think would take you more time, leave them for later on. Obviously, accuracy is a must. Do not make mistakes in haste. Be focussed. The exam is not the right time to develop tricks, please mind it. It's important in developing ways, you do not lose on attempting other questions.
We hope, you practice hard and develop new ways and shortcuts for calculation.
At the end I would like to quote words truly said by Paul Halmos:
"The best way to learn Mathematics is to do Mathematics"
This signifies that practice, practice, and practice can make you excel at Mathematics.
More Exercises on Speedy Calculations
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