🎯 RankerClub is 100% Free — 97 full-length mock tests with an instant all-India rank. Register Free →
RankerClub
Log in Get Started Free
Log in Register Free

RRB NTPC Mathematical Operations Questions with Answers & Explanations

20 Mathematical Operations questions from the General Intelligence & Reasoning section of RRB NTPC, each with the correct answer and a worked explanation. Try each question first, then tap Show answer to check. When you're ready, take the timed chapter-wise test to see your all-India rank.

Take the General Intelligence & Reasoning test → RRB NTPC full mocks
Question 1

If '+' means '×', '−' means '+', '×' means '÷' and '÷' means '−', what is the value of: 2 + 16 − 35 × 5 ÷ 8

  1. A32
  2. B31
  3. C30
  4. D34
Show answer
Answer: (B) 31 Replace the signs: 2 × 16 + 35 ÷ 5 − 8 = 32 + 7 − 8 = 31.
Question 2

If '+' means '×', '−' means '+', '×' means '÷' and '÷' means '−', what is the value of: 3 + 16 − 36 × 9 ÷ 4

  1. A45
  2. B50
  3. C48
  4. D49
Show answer
Answer: (C) 48 Replace the signs: 3 × 16 + 36 ÷ 9 − 4 = 48 + 4 − 4 = 48.
Question 3

If '+' means '×', '−' means '+', '×' means '÷' and '÷' means '−', what is the value of: 7 + 11 − 64 × 8 ÷ 1

  1. A84
  2. B83
  3. C86
  4. D79
Show answer
Answer: (A) 84 Replace the signs: 7 × 11 + 64 ÷ 8 − 1 = 77 + 8 − 1 = 84.
Question 4

If '+' means '×', '−' means '+', '×' means '÷' and '÷' means '−', what is the value of: 6 + 16 − 42 × 7 ÷ 2

  1. A100
  2. B95
  3. C98
  4. D105
Show answer
Answer: (A) 100 Replace the signs: 6 × 16 + 42 ÷ 7 − 2 = 96 + 6 − 2 = 100.
Question 5

If '+' means '×', '−' means '+', '×' means '÷' and '÷' means '−', what is the value of: 2 + 13 − 48 × 6 ÷ 3

  1. A29
  2. B31
  3. C32
  4. D26
Show answer
Answer: (B) 31 Replace the signs: 2 × 13 + 48 ÷ 6 − 3 = 26 + 8 − 3 = 31.
Question 6

If '+' means '×', '−' means '+', '×' means '÷' and '÷' means '−', what is the value of: 3 + 20 − 4 × 2 ÷ 4

  1. A61
  2. B53
  3. C58
  4. D59
Show answer
Answer: (C) 58 Replace the signs: 3 × 20 + 4 ÷ 2 − 4 = 60 + 2 − 4 = 58.
Question 7

If '+' means '×', '−' means '+', '×' means '÷' and '÷' means '−', what is the value of: 5 + 20 − 42 × 7 ÷ 2

  1. A106
  2. B103
  3. C99
  4. D104
Show answer
Answer: (D) 104 Replace the signs: 5 × 20 + 42 ÷ 7 − 2 = 100 + 6 − 2 = 104.
Question 8

If '+' means '×', '−' means '+', '×' means '÷' and '÷' means '−', what is the value of: 6 + 7 − 21 × 7 ÷ 9

  1. A38
  2. B36
  3. C35
  4. D34
Show answer
Answer: (B) 36 Replace the signs: 6 × 7 + 21 ÷ 7 − 9 = 42 + 3 − 9 = 36.
Question 9

If '+' means '×', '−' means '+', '×' means '÷' and '÷' means '−', what is the value of: 6 + 2 − 8 × 4 ÷ 1

  1. A8
  2. B16
  3. C13
  4. D12
Show answer
Answer: (C) 13 Replace the signs: 6 × 2 + 8 ÷ 4 − 1 = 12 + 2 − 1 = 13.
Question 10

If '+' means '×', '−' means '+', '×' means '÷' and '÷' means '−', what is the value of: 5 + 5 − 20 × 4 ÷ 2

  1. A25
  2. B30
  3. C29
  4. D28
Show answer
Answer: (D) 28 Replace the signs: 5 × 5 + 20 ÷ 4 − 2 = 25 + 5 − 2 = 28.

Ready for the real thing?
Timed General Intelligence & Reasoning test · 30 questions · instant rank

Start free test
Question 11

If '+' means '×', '−' means '+', '×' means '÷' and '÷' means '−', what is the value of: 5 + 8 − 28 × 4 ÷ 7

  1. A40
  2. B38
  3. C39
  4. D41
Show answer
Answer: (A) 40 Replace the signs: 5 × 8 + 28 ÷ 4 − 7 = 40 + 7 − 7 = 40.
Question 12

If '+' means '×', '−' means '+', '×' means '÷' and '÷' means '−', what is the value of: 9 + 12 − 30 × 6 ÷ 2

  1. A106
  2. B116
  3. C111
  4. D112
Show answer
Answer: (C) 111 Replace the signs: 9 × 12 + 30 ÷ 6 − 2 = 108 + 5 − 2 = 111.
Question 13

If '+' means '×', '−' means '+', '×' means '÷' and '÷' means '−', what is the value of: 7 + 13 − 16 × 4 ÷ 3

  1. A92
  2. B87
  3. C94
  4. D93
Show answer
Answer: (A) 92 Replace the signs: 7 × 13 + 16 ÷ 4 − 3 = 91 + 4 − 3 = 92.
Question 14

If '+' means '×', '−' means '+', '×' means '÷' and '÷' means '−', what is the value of: 6 + 3 − 12 × 4 ÷ 5

  1. A11
  2. B16
  3. C13
  4. D21
Show answer
Answer: (B) 16 Replace the signs: 6 × 3 + 12 ÷ 4 − 5 = 18 + 3 − 5 = 16.
Question 15

If '+' means '×', '−' means '+', '×' means '÷' and '÷' means '−', what is the value of: 9 + 10 − 56 × 7 ÷ 1

  1. A92
  2. B97
  3. C102
  4. D95
Show answer
Answer: (B) 97 Replace the signs: 9 × 10 + 56 ÷ 7 − 1 = 90 + 8 − 1 = 97.
Question 16

If '+' means '×', '−' means '+', '×' means '÷' and '÷' means '−', what is the value of: 2 + 12 − 49 × 7 ÷ 8

  1. A23
  2. B18
  3. C28
  4. D21
Show answer
Answer: (A) 23 Replace the signs: 2 × 12 + 49 ÷ 7 − 8 = 24 + 7 − 8 = 23.
Question 17

If '+' means '×', '−' means '+', '×' means '÷' and '÷' means '−', what is the value of: 3 + 17 − 72 × 8 ÷ 4

  1. A59
  2. B56
  3. C53
  4. D55
Show answer
Answer: (B) 56 Replace the signs: 3 × 17 + 72 ÷ 8 − 4 = 51 + 9 − 4 = 56.
Question 18

If '+' means '×', '−' means '+', '×' means '÷' and '÷' means '−', what is the value of: 3 + 13 − 45 × 5 ÷ 3

  1. A47
  2. B40
  3. C42
  4. D45
Show answer
Answer: (D) 45 Replace the signs: 3 × 13 + 45 ÷ 5 − 3 = 39 + 9 − 3 = 45.
Question 19

If '+' means '×', '−' means '+', '×' means '÷' and '÷' means '−', what is the value of: 6 + 14 − 27 × 3 ÷ 2

  1. A91
  2. B96
  3. C86
  4. D94
Show answer
Answer: (A) 91 Replace the signs: 6 × 14 + 27 ÷ 3 − 2 = 84 + 9 − 2 = 91.
Question 20

If '+' means '×', '−' means '+', '×' means '÷' and '÷' means '−', what is the value of: 7 + 9 − 8 × 4 ÷ 1

  1. A66
  2. B69
  3. C64
  4. D65
Show answer
Answer: (C) 64 Replace the signs: 7 × 9 + 8 ÷ 4 − 1 = 63 + 2 − 1 = 64.

These are RankerClub practice questions written in the RRB NTPC pattern. They are not official SSC/IBPS/RRB papers.

More General Intelligence & Reasoning topics

Alphabet & Word Order 25 Qs Series 24 Qs Order & Ranking 24 Qs Analogy 24 Qs Coding-Decoding 22 Qs Classification 21 Qs Syllogism 21 Qs Counting & Patterns 21 Qs

All RRB NTPC topics →