# Quantitative Aptitude Preparation Methods & Tips

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Quantitative Aptitude Shortcuts Tips & Tricks: Hello friends! We had set up you to the “POCKET KNOWLEDGE” series long back starting with Computers and now, we are back with QUANTITATIVE APTITUDE series. This is a collection of the main basics of this section or you can say fundamentals of the Mathematics. The topics which are included in this pdf are: additions, subtractions, multiplications and divisions. You may think that, these are very simple topics we have been learning from the era when we had started to learn math! Yes, we too do agree with you; but the thing is those which you had learned were the traditional method of solving. But, this traditional method of solving will not help you in the competitive exams as the exams are time constrained.

Tips & Tricks to Solve Quantitative Aptitude Questions

In such coaching institutes, you need to go with some of the tricks available to solve these methods. We should not call them as shortcuts; Instead of calling them as tips. maybe you will find a sea of such tricks for each topic on the Internet. Unfortunately, you are not left with much time to do research on the Internet to collect some tips and choose the best. In turn, we do this for you guys. We give you some of the best tips to make them simpler and easier calculations in exams. Now it is your turn to learn them and practice them with the utmost concentration. Practice every problem at the start to ensure that you are good on the bases and the next step will focus more on crooked or indirect questions.

Quantitative Aptitude Tips

1. Data interpretation is really important. DI sets take less than 10 minutes and normally accuracy is high in these questions.
2. Data sufficiency questions are actually bonus questions. You don’t need to solve the questions, you need to find out whether the information given is sufficient or not.
3. As exam difficulty is going to increase, concentrate on accuracy.
4. Devote at least 35 minutes to this section.
5. Always attempt Quantitative Aptitude first as this section takes lots of efforts and concentration.
6. Practice few online tests
7. Make mental calculations
8. Never skip questions quickly
9. If you have no idea about an question set, simply skip it. Don’t try to solve questions that are unusual for you.
10. Never stick to a question. If a question took more than 3 minutes, simply skip it.
11. Ideal attempt = 80% questions with 80% accuracy

DIGITAL SUM

Definition: Digital Sum is the sum of the digits of given expression/series until a single digit is obtained.

Let me explain you a bit clearly. Let us take an example to understand the definition.

Example: 286+396+534+952+443 = ?

1. a) 3531 b)   2581     c)   2611     d)   2621

Solution:  We can see that this is a big expression and it takes some time to calculate, and it takes a bit more time to calculate without pen and paper (As this is key In Bank Exams).

Now, let us see how an digital sum solve our problem. Start adding the digits.

i.e., (2+8+6) + (3+9+6) + (5+3+4) + (9+5+2) + (4+4+3) = 16+18+12+16+11

= (1+6) + (1+8) + (1+2) + (1+6) + (1+1)

= 7+9+3+7+2 = 28 = 2+8 = 10 = 1+0 = 1

Guys, please don’t panic by seeing the above thing.. It’s very easy, just you need to add all the digits till you get a single digit number

So, the Digital Sum of the given expression is: 1

Now, let us calculate the D.S. of the options:

1. a) 3+5+3+1 = 12 = 1+2 = 3   Hence, this is not the answer
2. b) 2+5+8+1 = 16 = 1+6 = 7     This is also not the answer
3. c) 2+6+1+1 = 10 = 1+0 = 1     Bingo! We got the answer!!!
4. d) 2+6+2+1 = 11 = 1+1 = 2      This is also not answer!!!

So guys, I hope you have understood the concept by this time.. Let us discuss some more examples and then we will look at the applications of D.S. and next level of examples.

Example: 23*47 =?

Options:     a) 981         b) 861         c) 1281         d) 1081

Solution:  D.S. of 23 = 2+3 = 5   & D.S. of 47 = 4+7 = 11 = 1+1 = 2

Now, D.S. of 23*47 = 5*2 = 10 = 1+0 = 1

Let us check the D.S. of the given options:

1. a) 9+8+1= 9 Not the answer
2. b) 8+6+1=6 Not the answer
3. c) 1+2+8+1=3 Not the answer
4. d) 1+0+8+1=1 This is the answer

Application of D.S. in Compound Interest:

We already know about concept of “COMPOUND INTEREST”. Now let us see the application of Digital Sum in CI.

We know that, Amount = Principal * (1+(R/100))n

Where, R is the Rate of interest in %     &    n is the number of years.

Example: Find the amount, when P = 5600, R= 10% and n= 2 years

Options: a) 6776   b) 6175   c) 5879   d) 5113

Solution: We know that, A = P* (1+(R/100)) n

A = 5600*(1+ (10/100)) 2è DS is: (5+6) * (1+1)2 = 11*4 = 8

Now let’s check the options:

1. a) 6+7+7+6 = 2+6 = 8 This is the answer
2. b) 6+1+7+5 = 1+9 = 1
3. c) 5+8+7+9 = 1+1 = 2
4. d) 5+1+1+3 = 1+0 = 1