Infosys Aptitude Syllabus 2018
Infosys Aptitude 2018
Every year Infosys updates the aptitude syllabus and the difficulty level of its Quants Section. In 2018, there are 10 questions asked in the aptitude section. To get a better percentile, and shortlisted for major MNC’s one should have a command on the aptitude section specifically.
Infosys Aptitude Syllabus 2018
The topics such as Permutation & Combination; Speed, Time & Distance/ Boats & Streams and Profit & Loss/ Mixture & Allegations are the most important in the complete Aptitude section of Infosys. These are the fixed topics as the student will find 1-2 questions from each of them in the paper.
Here are the formulas involved for the topics of the aptitude section for Infosys.
- Data Interpretation
- Permutation and Combination
- Percentages
- Probability
- Area, Shapes, Perimeter
- Speed, Time & Distance/ Boats & Streams
- Time & Work
- Profit & Loss/ Mixture & Allegations
Data Interpretation
Data – The term data is a collection of facts and statistics for reference or for analysis of anything. It can be either in a numerical or a descriptive form. Data can be represented in a tabular form, graphical, pie charts, or line graphs.
Interpretation – Explaining one’s own understanding of something.
Data Interpretation – An act of drawing conclusion from the given data or analysing the given data to draw some useful information out of it.
Concepts and formulas majorly involved in solving Data Interpretation questions:
Averages = Sum of the all the values/ Number of values
Ratio and Proportion = Comparing the like terms
Percentages = y is what percent of y/x * 100
y is what percent more or less than x = (y-x)/y *100
Percentage change = (Final value – Initial Value)/ Initial Value *100
Permutation and Combination
The arrangement of objects from a set or a subset mostly without repetition in n number of ways. When the order of selection is a factor it is termed as permutation, whereas when order is not a factor then it is a combination.
Formulas involved in solving Permutation and Combination questions:
Permutations = nPk = n!/(n − k)!
Combinations = nCk = n!/ k!*(n-k)!
Percentages
Formulas involved in solving Percentages
- y is what percent of y/x * 100
- Percentage change = {change/(initial value)} x 100
- Increase N by S % = N( 1+ S/100 )
- Decrease N by S % = N (1 – S/100)
- If A is x% more /less than B, then B is 100x/ (100 + x) % less/more than A.
- Successive Percentage Change = {(a + b + (ab/100)}%
- Price of any commodity increases by P% = (P/100+P)*100
- Price of any commodity decreases by P% = (P/100-P)*100
Probability
Basically the chances of something occurring is termed as probability.
Formulas involved in Probability
Probability of something occurring = Concerned number of events / Total number of events
Events taking place = ( )
Events not taking place = ( )
P ( ) + P ( ) = 1
- If ‘ And’ event is given = multiply or add events together
- If ‘ Or ’ event is given = add the two or more events
Questions can be based on Dice, Coins, Cards, or Balls.
Area, Shapes, Perimeter
Area is termed as the amount of number of square units present in any figure.
Perimeter is the outside distance of any figure
Area = Perimeter + inside; Perimeter = Outside
Formulas involved for some common figures
Figure | Area | Perimeter |
Square | Base * Height | side+side+side+side = 4(side) |
Rectangle | Base * Height | height + height +base + base= 2h+2b |
Triangle | Base * Perpendicular Height /2 | a+b+c |
Trapezium | (a+b)*height/2 | a+b+c+d |
Parallelogram | Base*Perpendicular Height | 2(a+b) |
Rhombus | Length *Height/2 | a+a+a+a = 4a |
Kite | Length *Height/2 | a+a+b+b = 2(a+b) |
Speed, Time & Distance/ Boats & Streams
Average Speed is = Total Distance covered/ Total Time Taken
- If the given distance is constant = 2xy/ x+y
- If the given time is constant = (x+y)/2
Distance = Speed* Time (Speed and Time are inversely proportional to each other, i.e. Speed increases time decreases)
Relative Speed is the speed of a moving object with respect to the other object.
Boats & Streams
If the boat is moving in the direction of the stream then it is taken as Downstream.
If the boat is moving in the direction opposite to the stream then it is taken as Upstream.
Let’s assume speed of boat to be ‘b’ and speed of the stream as ‘s’:
Aggregate Downstream Speed = b + s kmph
Aggregate Upstream Speed = b – s kmph
Speed of boat in Still Water = ½ (Downward Speed + Upward Speed )
Speed of the Stream = ½ (Downward Speed – Upward Speed )
Time & Work
Fraction Technique
X = 10 days i.e so work done in a day is 1/10th.
Efficiency Technique
X = 10 days so efficiency of X per day = 100/10 = 10%
Profit & Loss/ Mixture & Allegations
When the Selling Price of an article > Cost Price of the article, then it’s a profit
When the Cost Price of an article > Selling Price of the article, then it’s a loss.
- Profit = Selling Price – Cost Price
%profit = {(Selling Price – Cost Price)/Cost Price} x 100 - Loss = Cost Price – Selling Price
%Loss = {(Cost Price – Selling Price)/Cost Price} x 100 - Sale price :- If there is a profit of P %,
Cost Price = C
Then SP = {(100+P)/100}xC - If there is a loss of L %,
Cost Price = C
Then
SP = {(100-L)/100}xC - Cost price :-
If there is a profit of P %,
Cost Price = C
Sale price= SP
Then C = {100/(100+p)} x SP
If there is a loss of L %,
Then
C = {100/(100-L)}xSP - If the price of an item increases by r% = (r/ 100+r) *100%
- If the price of an item decreases by r% = (r/ 100-r) *100%
- If profit percentage and loss percentage are equal = %loss = p2 /100
- to find the ratio in which two or more ingredients at the given price must be mixed to produce a mixture of desired price =
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