# Aptitude [TCS Placement]: Sample Questions 19 - 21 of 174

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## Question 19

Aptitude

### Explanation

- First term of the series is 2.
- Second term of the series is 7, i.e..
- Third term of the series is 24, i.e..
- Fourth term of the series is 77, i.e..
- Following the same pattern we can find the next term of the series.
- Next term will be

## Question 20

Aptitude

### Question

MCQ▾A can do a piece of work in 20 days and B can do it in 12 days. B worked at it for 9 days. In how many days A alone can finish the remaining work?

### Choices

Choice (4) | |
---|---|

a. | 6 |

b. | 12 |

c. | 8 |

d. | 5 |

### Answer

d.### Explanation

- A can do a piece of work in 20 days and B can do it in 12 days.
- B works for 9 days.
- In 12 days B can complete the whole work
- So, in one day B can complete work
- In 9 days B can complete work
- Yet, 1/4 work is remaining, which A has to complete.
- A can complete the work in 20 days.
- So, in one day A can complete work
- So, to complete 1/4 work, A will take = = 5 days
- A will complete the remaining work in 5 days.

## Question 21

Aptitude

Edit

### Write in Short

Short Answer▾Average age of 18 men is decreased by 1 year when one man whose age is 49 years is replaced by a new man. Find age of the new man.

### Explanation

- Let the average of 18 men be x previously.
- So, total age of 18 men = 18x
- It becomes x - 1 when one man of age 49 is replaced by a new man.
- Let the age of new man be y years.

- So, age of new man is 31 years.