Tata Infotech Placement: Sample Questions 8 - 9 of 41

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Question 8

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Short Answer▾

Complete the following series.

18, 20, 10, 12,4, 6, ________

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

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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.

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