In this article, We have provided Infosys Aptitude Questions and Answers with Explanation. From this page, candidates can gather the sample Infosys Aptitude Questions and Answers. By practicing these questions job aspirants can assume the difficulty level of the test as well as he/she can save time while attempting the online exam. Please note that provided * Infosys Aptitude Questions and Answers For Freshers (2018, 2019, 2020 Batches) *are Infosys model questions but not actual questions. By learning these Infosys Aptitude Questions and Answers, students can manage time easily during the actual exam.

**You Can Also Check: Infosys Off Campus Recruitment & Infosys Placement Papers**

Contents

## Infosys Aptitude Questions and Answers with Explanation

**Number of Questions:** 10

**Time Limit:***25 mins.*

By analyzing we have also designed the approximate number of questions may ask from each topic of Aptitude section in the below table. Kindly take a look on it

Topics | Questions asked ( Approximately) |
---|---|

Averages | 2-4 Questions |

Profits & Loss | 3-4 Questions |

Percentages | 2-4 Questions |

Ratio and Proportion | 1-3 Questions |

Boats and Streams | 1-2 Questions |

Simple Interest | 2-3 Questions |

Compound Interest | 2-4 Questions |

Volumes | 2-3 Questions |

Probability | 1-3 Questions |

Partnership | 1-3 Questions |

Problems on Boats and Streams | 1-3 Questions |

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### Download Infosys Aptitude Questions and Answers in PDF format

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### Sample Infosys Aptitude Questions and Answers with Explanation

1. **The average age of 30 boys in a class is equal to 14 years. When the age of the class teacher is included the average becomes 15 years. Find the age of the class teacher?**

A. 45

B. 42

C. 50

D. 44

**Answer –** A. 45

**Explanation:**

Given that

Total ages of 30 boys = 14 x 30 = 420 years

Total age when class teacher is included = 15 x 31 = 465 years

Age of class teacher = 465 – 420 = 45 years

Hence, the age of the class teacher is 45 years.

2. **The average of 11 numbers is 10.9. If the average of the first six is 10.5 and that of the last six is 11.4 the sixth number is?**

A. 11.4

B. 11.5

C. 11.0

D. 11.3

**Answer –** B. 11.5

**Explanation:**

Given, 1 to 11 = 11 * 10.9 = 119.9

1 to 6 = 6 * 10.5 = 63

6 to 11 = 6 * 11.4 = 68.4

63 + 68.4 = 131.4 – 119.9 = 11.5

Therefore, 6th number = 11.5

3. **A shop dealer makes his goods 25% above CP and then while selling gives a discount of 12% on MP. Find his profit % ?**

A. 15%

B. 12%

C. 11%

D. 10%

**Answer –** D. 10%

**Explanation:**

Let Cost Price (CP) = 100

Market Price (MP) = 125

Profit = 125*88/100 = 110

110 – 100 = 10%.

4. **A and B rent a pasture for 10 months. A put in 80 cows for 7 months. How many can B put in for the remaining 3 months, if he pays half as much again as A?**

A. 120

B. 280

C. 180

D. 200

**Answer –** B. 280

**Explanation:**

According to the given data

80* 7: x* 3 = 1:1 1/2

560: 3x = 2: 3

x = 280

5.** Rama Krishna can finish a work in 20 days and Suresh in 25 days. They both work together for 5 days and then Suresh goes away. In how many days will Rama Krishna complete the remaining work?**

A. 10 days

B. 11 days

C. 8 days

D. 9 days

**Answer –** B. 11 days

**Explanation:**

Let’s assume the completion of remaining work by Ramesh is x then, according to the given information

(5 + x)/20 + 5/25 = 1 => x = 11 days

6. **If P can do a work in 6 days and Q can do the same work in 8 days. If R who can do the same work in 12 days, joins them, then the work will be completed in how many days?**

A. 7/3 days

B. 8/3 days

C. 10/3 days

D. 11/3 days

**Answer –** B. 8/3 days

**Explanation:**

1/6 + 1/8 + 1/12 = 1/d.

D = 8/3 days

Therefore, the work will be completed in 8/3 days.

7.** 5 men and 10 boys can do a piece of work in 30 days and 8 men and 12 boys can do the work in 20 days then the ratio of daily work done by a man to that of the boy.**

A. 6:1

B. 7:3

C. 4:5

D. 5:1

**Answer –** A. 6:1

**Explanation:**

5m + 10b = 1/30 and 8m + 12b = 1/20

after solving we get m = 1/200 and b = 1/1200

so required ratio = (1/200) : (1/1200) = 6:1

Hence, the ratio of daily work done by a man to that boy is 6:1.

8. **A man spends 60% of his income. His income is increased by 20% and his expenditure also increases by 10%. Find the percentage decrease in his saving?**

A. 15%

B. 20%

C. 25%

D. 10%

**Answer –** D. 10%

**Explanation:**

Let us assume initially income is 100.

So, expenditure = 60 and saving = 40

Now income is increased by 20% that is 120.

So, expenditure = (70/100)*120 = 84 and saving = 36

so % percent decrease in saving = (4/40)*100 = 10%

9. **Rani mixes 70kg of sugar worth Rs.28.50 per kg with 100kg of sugar worth Rs.30.50 per kg. At what rate shall he sell the mixture to gain 10 %?**

A. Rs.29.75

B. Rs.32.64

C. Rs.31.50

D. Rs.30.46

**Answer –** B. Rs.32.64

**Explanation:**

70/100 = 100x – 30.50(110)/28.50(110)-100x

0.7 = 100x-3355/3135-100x

2194.5 – 70x = 100x-3355

170x = 5549.5

X = 32.64

10. **How much water must be added to a bucket which contains 40 liters of milk at the cost price of Rs.3.50 per liter so that the cost of milk reduces to Rs.2 per liter?**

A. 25 liters

B. 28 litres

C. 30 liters

D. 35 liters

**Answer –** C. 30 liters

**Explanation:**

Total cost price =Rs(40 x 7/2) = Rs.140

Cost per litre =Rs.2

Total quantity = 140/2 = 70 liters.

Water to be added =(70-40) =30 liters.

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