Infosys Aptitude Questions on Mathematical Ability | Test Prep Guide

Infosys Aptitude Questions on Mathematical Ability | Test Prep Guide

Infosys Aptitude Questions on Mathematical Ability

If you’re preparing for the Infosys online test, one of the key sections you’ll encounter is the Mathematical Ability test. This section is designed to evaluate your numerical and problem-solving skills, which are critical for roles in technical and analytical domains. To help you ace this section, we’ve compiled the latest Infosys aptitude questions, explanations, and tips to help you perform your best.


Infosys Mathematical Ability Section Overview

The Mathematical Ability section of the Infosys Online Test consists of 15 questions that need to be completed in 25 minutes. This section typically covers a variety of mathematical concepts with a medium difficulty level, so it’s essential to be well-prepared. The questions will test your ability to quickly solve problems under time pressure, and can come from the following topics:

A percentage represents a fraction of 100. It is used to compare values proportionally.

Common formulas include Percentage = (Value/Total) × 100 and percentage increase or decrease calculations.

Profit and loss are calculated based on the cost price (CP) and selling price (SP).

Profit= SP – CP, and Loss = CP – SP, with profit/loss percentage calculated using CP

The relationship is given by Speed = Distance / Time. Key concepts include relative speed, average speed, and conversions (e.g., km/hr to m/s).

The average (or mean) is the sum of all values divided by the number of values.

Formula: Average = (Sum of Observations) / (Number of Observations).

Simple Interest (SI) = (P × R × T) / 100, where P = principal, R = rate, and T = time.

Compound Interest (CI) = P(1 + R/100)ⁿ – P, where n is the number of years

A ratio compares two quantities, while a proportion states that two ratios are equal.

Example: If the ratio of A to B is 3:5, then A/B = 3/5.

A sequence of numbers following a specific pattern (addition, multiplication, squares, etc.). Finding the missing number requires recognizing the pattern used.

Problems involve pipes filling or emptying a tank at different rates.

If a pipe fills in x hours and another empties in y hours, net work per hour is (1/x – 1/y).

.


Important Topics to Focus On

1. Percentages and Profit & Loss

Expect questions related to profit margins, discounts, and simple percentage calculations. These are often tested in real-world scenarios, such as sales discounts or finding the cost price based on selling price.

2. Time, Speed, and Distance

Questions on this topic test your understanding of moving objects, trains, or vehicles. You’ll need to calculate time, distance, or speed based on given parameters. Commonly, these involve formula-based problem-solving.

3. Ratios and Proportions

These questions evaluate your ability to relate quantities in various proportions. You’ll often find problems involving mixtures, shared resources, or dividing amounts in a particular ratio.

4. Averages and Simple Interest

You may encounter questions on calculating the average of a set of numbers or solving problems related to simple and compound interest. Both of these concepts are commonly tested in competitive exams.

5. Number Series

This section will test your pattern recognition and ability to solve number series. It’s a good idea to practice identifying common series patterns, whether arithmetic, geometric, or other complex number series.


Sample Infosys Aptitude Questions with Detailed Solutions

To get a better understanding of the type of questions asked in the Infosys Mathematical Ability section, here are some sample questions along with detailed solutions:

Question 1

Q: A person buys an item for ₹500 and sells it at a profit of 20%. What is the selling price of the item?

Solution:
Profit = 20% of ₹500 = ₹100
Selling price = ₹500 + ₹100 = ₹600

Answer: ₹600

Question 2

Q: A train travels at 60 km/h. How long will it take to cover a distance of 180 km?

Solution:
Time = Distance / Speed = 180 km / 60 km/h = 3 hours

Answer: 3 hours

Question 3

Q: If the average of five numbers is 30, what is the sum of the five numbers?

Solution:
Average = Sum of numbers / Number of numbers
30 = Sum / 5
Sum = 30 * 5 = 150

Answer: 150

Question 4

Question: A student scored 420 marks out of 600 in an exam. What is his percentage score?

Options:
A) 60%
B) 65%
C) 70%
D) 75%

Solution:
Percentage = Obtained MarksTotal Marks×100\frac{\text{Obtained Marks}}{\text{Total Marks}} \times 100Total MarksObtained Marks​×100
= 420600×100=70%\frac{420}{600} \times 100 = 70\%600420​×100=70%

Answer: C) 70%


Question 5

Question: A shopkeeper buys a mobile for ₹8,000 and sells it for ₹10,000. What is his profit percentage?

Options:
A) 20%
B) 25%
C) 30%
D) 40%

Solution:
Profit = Selling Price – Cost Price = 10,000 – 8,000 = ₹2,000
Profit % = Profit Cost Price×100\frac{\text{Profit}}{\text{Cost Price}} \times 100Cost PriceProfit​×100
= 20008000×100=25%\frac{2000}{8000} \times 100 = 25\%80002000​×100=25%

Answer: B) 25%


Question 6

Question: A train travels at 60 km/hr. How much time will it take to cover 240 km?

Options:
A) 3 hours
B) 4 hours
C) 5 hours
D) 6 hours

Solution:
Time = Distance Speed\frac{\text{Distance}}{\text{Speed}}Speed Distance​
= 24060=4\frac{240}{60} = 460240​=4 hours

Answer: B) 4 hours


Question 7

Question: The average of five numbers is 36. If one number is removed, and the new average becomes 34, what was the removed number?

Options:
A) 36
B) 40
C) 44
D) 46

Solution:
Total sum of 5 numbers = 5×36=1805 \times 36 = 1805×36=180
Total sum after removing one number = 4×34=1364 \times 34 = 1364×34=136
Removed number = 180 – 136 = 44

Answer: C) 44


Question 8

Question: Find the simple interest on ₹5,000 at a rate of 10% per annum for 3 years.

Options:
A) ₹1,000
B) ₹1,500
C) ₹2,000
D) ₹2,500

Solution:
Simple Interest = P×R×T100\frac{\text{P} \times \text{R} \times \text{T}}{100}100P×R×T​
= 5000×10×3100\frac{5000 \times 10 \times 3}{100}1005000×10×3​
= ₹1,500

Answer: B) ₹1,500


Question 9

Question: The ratio of A’s age to B’s age is 3:5. If A is 18 years old, how old is B?

Options:
A) 25 years
B) 28 years
C) 30 years
D) 32 years

Solution:
Let A’s age be 3x and B’s age be 5x.
Given, 3x = 18, so x = 6.
B’s age = 5 × 6 = 30 years.

Answer: C) 30 years


Question 10

Question: Find the missing number in the series: 2, 6, 12, 20, 30, ?

Options:
A) 36
B) 38
C) 42
D) 44

Solution:
Pattern: Add consecutive even numbers (2, 4, 6, 8, 10, …)

  • 2 + 4 = 6
  • 6 + 6 = 12
  • 12 + 8 = 20
  • 20 + 10 = 30
  • 30 + 12 = 42

Answer: C) 42

Sample Aptitude Questions on Mathematical Ability

Welcome to your Mathematical Ability

Year of Passing
A man spends 30% of his salary on rent, 40% on groceries, and saves the remaining ₹12,000. What is his total salary?

A shopkeeper buys an item for ₹800 and sells it for ₹1,000. What is the profit percentage?

A car covers 240 km in 4 hours. What is its speed?

The average of 5 numbers is 48. If one number is removed and the new average is 45, what was the removed number?

Find the simple interest on ₹5,000 at 8% per annum for 2 years.


How to Prepare for the Infosys Mathematical Ability Section

To do well in the Infosys aptitude test, especially the Mathematical Ability section, follow these essential preparation tips:

  1. Practice Regularly: Consistency is key. Practice a variety of problems from all topics listed in the syllabus. Use online platforms, mock tests, and previous year questions to track your progress.
  2. Focus on Speed and Accuracy: With only 25 minutes to solve 15 questions, you need to balance speed and accuracy. Start with easier questions to gain confidence and then tackle the more difficult ones.
  3. Revise Formulas: Make sure you’re familiar with basic formulas, such as those for profit and loss, percentage, interest, and averages. Quick recall of these formulas can save you time during the test.
  4. Time Management: Allocate specific time limits to each section. If you’re stuck on a question, don’t waste too much time. Move on and return to the difficult questions later if time permits.
  5. Understand the Basics: While the questions may seem challenging at first, ensure you have a strong grasp of basic mathematical principles. The questions are designed to test your application of concepts, not just your ability to memorize formulas.

Boost Your Placement Chances – Join Our FREE Campus Placement Evaluation Test

If you’re serious about placements, feel free to attend our FREE Campus Placement Evaluation Test! https://faceprep.in/article/campus-placement-evaluation-test/

Conclusion: Ace the Infosys Mathematical Ability Test

The Infosys Aptitude Test for the Mathematical Ability section is an essential part of the recruitment process, and with adequate preparation, you can easily crack it. By practicing regularly, focusing on key topics, and managing your time wisely, you can significantly improve your chances of success.

We hope this guide provides you with the clarity and resources to prepare effectively. Best of luck with your Infosys online test – go ahead and take the first step towards a promising career!

Infosys Aptitude Questions on Mathematical Ability: Your Guide to Acing the Test

c