Aptitude [TCS Placement]: Sample Questions 135 - 136 of 174

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Question 135

Aptitude

Question

MCQ▾

On a 26 question test, 5 points were deducted for each wrong answer and 8 points were added for right answers. If all the questions were answered how many were correct if the score was zero.

Choices

Choice (4)

a.

10

b.

11

c.

13

d.

12

Answer

a.

Explanation

  • In a 26 question test, 5 points were deducted for each wrong answer and 8 points were added for right answers.
  • All 26 questions are answered and resultant score is zero.
  • We are asked to find the number of right answered questions.
  • For option a) , 10 are correct, i.e..

16 are incorrect, i.e..

So,

  • For option b) , 11 are correct, i.e..

15 are incorrect, i.e..

So,

  • For option c) , 13 are correct, i.e..

13 are incorrect, i.e..

So,

  • For option d) , 12 are correct, i.e..

14 are incorrect, i.e..

So,

  • We can see among all options, for option a) only, resultant score is zero.

Question 136

Aptitude
Edit

Write in Short

Short Answer▾

Complete the series: 3, 22, 7,45, 15, ? , 31

Explanation

  • Divide the given series into odd and even terms series.
  • Odd term series: 3, 7,15, 31, …
  • Even term series: 22,45, ? …
  • Looking at the analogy, we can conclude that next term is one more than twice of its previous term.
  • Like,

  • Following the same pattern,
  • So, missing term will be 91.

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