Math Tables in Audio (Mp3) format

First time in the history, Gr8AmbitionZ.com is proudly presenting Math tables in audio (Mp3) format. The concept behind this post is very simple. Its an open secret that most of us don’t know the answer of “What is Seventeen eights are!!!”. Ofcourse we do have some techniques to calculate the answer in our minds, but my question is “Why to waste those few seconds during the time of exam???”. We are posting the tables in audio format because It has been known for years that our brains can continue to take in and learn new information even while we are asleep. So why not use this to help those people who have great difficulty in learning their 'times tables'. These  files are numbered the same as the tables. i.e. the Ten’s times table is track 10; the Thirteen’s times table is track 13 etc. The tables cover the numbers from 1 to 20! You can use the files in two different ways : 

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Data Interpretation for IBPS PO VII Exam 2017

Data Interpretation,  the one of the easiest, time taking and scoring topic of the Bank Exams.  Everybody knows this fact... but people pay less attention on this area. But unfortunately in IBPS PO VII Exam, the complete aptitude section will depend on Data Interpretation. So you should concentrate more on this area.

In this post, we shall discuss about the basics Data Interpretation.  The Data Interpretation is also called as comprehension of mathematics. Because, in reading comprehension, we have to study the passage and answer the questions followed by that passage. In the same way, in Data Interpretation, some data is given in the form of graphs, charts and tables followed by questions. We have to study, understand and analyze the data to solve the questions. Here we have to keep in mind that, even a 10th standard boy can solve these problems. But you've to solve these problems IN TIME.

So you have to practice well so that you can do the small calculations (like additions, subtractions, and simple multiplications) with a glance (see here for shortcuts in mental maths). Now lets have a look at some basic details of Data Interpretations.

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Bar Diagrams

The Bar Diagram is the basic model of the Data Interpretation Problems. The bar diagram is a two dimensional graphic representation where the elementary graphic objects are a set of rectangles or bars drawn in parallel so that the extension of the same is proportional to the magnitude they intend to represent. 

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Speed Improvement Test - Day 5

Recommended Time : 15 Mins

<< Read Shortcut Techniques Here

Additions / Subtractions

1. 3972 + 7646 + 8791 + 2763 + 9437 = ?
2. 7149 + 3487 + 2983 + 6731 + 8971 = ?
3. 545 - 32 + 217 + 49 - 117 + 81 =?
4. 642 + 717 - 84 + 343 - 119 + 420 = ?
5. 2636 - 1742 + 8346 + 73 - 514 = ?

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Problems on Number Series

<< Read Shortcut Rules Here

1.     1, 10, 19, 28, 37, 46, _

a.      40

b.     42

c.      55

d.     54

e.      86

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Profit, Loss and Discount shortcut techniques - Lesson 1

If you buy a mobile for Rs 1000, then it is called Cost Price. If you sell that to me for Rs 2500 (don't worry, I am dumb enough to buy that) then it is called the Selling Price. Here you made a "PROFIT" or "GAIN" of Rs 1500. If i sell the same mobile for Rs. 1800 to anybody else, then I will make a "LOSS" of Rs. 700.

Simply we can say that, if the Selling Price is is more than the Cost Price we can Make Profit. or If the Cost Price is more than the Selling Price then we will end up with Loss.

Profit = Selling Price (S.P) - Cost Price (C.P)

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BODMAS

• In The simplifications of numerical questions, the order of mathematical operations to be followed is given in the abbreviated form : "BODMAS", where

• B stands for 'Bracket'
• O stands for 'Of'
• D stands for 'Division'
• M stands for 'Multiplication'
• A stands for 'Addition' and
• S stands for 'Subtraction'.
• Order to be followed by in case of brackets is as follows :
• (   )  : Small Brackets,
• {  } : Curly Brackets   and
• [  ]  : Square Brackets

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Shortcuts in Division

There are so many types of divisions are there. Lets have a look.

Division by parts --> Imagine you have Rs.874 . You have to give that to your two children.
874/2    [We can write this 874 as 800+74 (for our convenience)
= 800/2 + 74/2
= 400 + 37
= 437 

Division using the factors of the divisor: "this is also called as Double Division"
70/14
= (70/7)/2    (Because 7 and 2 are the factors of 14)
= 10/2
= 5

Division using Fractions:
132/2
= (100/2 + 32/2) ( here we've broken the given fraction into two separate fractions)
= (50 + 16)
= 66

Division by 5 :
Note: if you have to divide any number with 5, then divide it by 100 and then just multiply by 20
1400/5
= (1400/100) x 20
= 14 x 20
= 280

Division by 10 (Its very simple, just move the decimal point one place to the left)
0.5/10
= 0.05 

Division by 50 ( Just divide with 100 then multiply by 2)
2100/50
= (2100/100) x 2
= 21 x 2
= 42

700/50
= (700/100) x 2
= 7 x 2
= 14

Division by 100 (just move the decimal point two places to the left)
25/100 
= 0.25

Division by 500 (just divide with 100 and then multiply with 0.2)
17/500 
= (17/100) x 0.2 
= 0.17 x 0.2
= 0.034

Division by 25 (just divide by 100 and then multiply by 4 )
500/25
= (500/100) x 4
= 5 x 4
= 20

750/25
= (750/100) x 4
= 7.5 x 2 x 2
= 30

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Shortcuts in Multiplications

NOTE : These techniques are for Mental Maths. You should do calculations in your mind only. Please avoid using Pen/Pencil and Paper. 

Multiplication using multiples

Assume that we should find out the result of 12X15. 

12 x 15   (Here we can write this 15 as 5x3)

=  12 x 5 x 3 (now 12x5 becomes 60)

=  60 x 3 (For this you just calculate 3x6, that is 18 and add one Zero to it. that is 180)

=  180 (see, how simple it is?)

Multiplication by distribution 

Assume that we should find out the result of 12x17

12 x 17   (Here we can divide this 17 as 10+7. here, multiplying 12 with 17 is same as multiplying 12 with 10 and 7 separately and then adding the results)

so, we can write it as

= (12 x 10) + (12 x 7) 

= 120 + 84

= 204 

Multiplication by "giving and taking"

12 x 47  (Here its little difficult for us to calculate the multiplication of 12 and 47 mentally. so just check for the ROUNDED number nearer to 47. Yes it is 50. so.....

= 12 x (50 - 3) 

= (12 x 50) - (12 x 3)  (we have discussed this rule earlier)

= 600 - 36

= 564

Multiplication by 5

* If we have to multiply a number with 5, just divide the number with 2 and then multiply the result with 10. Confused? Its very simple step actually....

428 x 5   (Now just divide the number with 2)

= 428 x 1/2 = 214 (Now multiply it with 10. I mean just add a zero at the end :P)

= 214 x 10

= 2140 (This is our result)

Whats the logic behind this step? 

Very simple. 

* Lets say the number is X. 

* Now we are dividing the number with 2.  so here X becomes X/2. 

* And then we are multiplying it with 10.  So it will become 10x / 2  

* Now cancel it with 2. so it becomes 10x / 2 = 5X = 5 multiplied by X. Thats it ;)

Multiplication by 10  ------------  just move the decimal point one place to the right

16 x 10

= 160

15.9 = 159

169.93 = 1699.3   (Need an explnation for this too??? :P)

Multiplication by 50 ------ divide with 2 and then multiply by 100

Well, this is also same process as we did for 5. Here we should add an extra zero. Thats it

18 x 50

= (18/2)  = 9

= 9 x 100

= 900

Multiplication by 100 -------- move the decimal point two places to the right

45 x 100

= 4500  

Multiplication by 500-------- divide with two and multiply with 1000 

21 x 500

= 21/2 x 1000

= 10.5 x 1000

= 10500

Multiplication by 25 ---------- use the analogy Rs 1 = 4 x 25 Paise

25 x 14 (just divide the 14 as 10+4)

= (25 x 10) + (25 x 4) 

= 250 + 100 --->  Rs2.50 + Rs1

= 350

Hey one more thing. Here you can use another technique too. Which we have used for multiplication with 5.

Multiplication by 25 -----------  Divide by 4 and multiply by 100 

36 x 25

= (36/4) x 100

= 9 x 100

= 900  

Multiplication by 11 (if sum of digits is less than 10)

72 x 11

= 7+2 =9, it is Less than 10. so,

= place this term 9 between 7 &2

= 792 (That's the answer)

Multiplication by 11 (if sum of digits is greater than 10)

87 x 11

=>  8 + 7 = 15 

because here 15 is greater than 10, first use 5 and then add 1 to the first term 8, 

which gives you the answer

= 957 

Multiplication of numbers ending in 5 with the same first terms (square of a number)

25 x 25 

first term = (2 + 1) x 2 = 6

last term = 25

answer = 625 ---> square of 25

75 x 75 

first term = (7 + 1) x 7 = 56

last term = 25

answer = 5625 ---> 75 squared

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