# Tata Infotech Placement: Sample Questions 8 - 9 of 41

Glide to success with Doorsteptutor material for competitive exams : get questions, notes, tests, video lectures and more- for all subjects of your exam.

## Question 8

### Explanation

- Divide the given series into odd and even terms series.
- Odd term series: 18,10, 4, …
- Even term series: 20,12, 6, …
- Next term will follow the same pattern as odd term series.
- Here, first and second terms of the series are 18 and 10, i.e.. Difference between them is -8.
- Second and third terms of the series are 10 and 4, i.e.. Difference between them is -6
- Same way, difference between third and fourth term of the series should be -4 (as difference gets decremented by two each time)
- So, next term will be

## Question 9

Edit

### Write in Short

Short Answer▾A company installed 36 machines at the beginning of the year. In March they installed 9 additional machines and then disconnected 18 in August. How many were still installed at the end of the year?

### Explanation

- In the beginning company installed 36 machines.
- In March, they installed 9 more machines and then disconnected 18 machines in August.
- We are asked to find the number of machines which were still installed at the end of year.
- Converting this statement into equation form,

- So, there are yet 27 machines installed.