🎯 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

GATE Mathematical Operations Questions with Answers & Explanations

15 Mathematical Operations questions from the General Aptitude (Quantitative & Reasoning) section of GATE, 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 Aptitude (Quantitative & Reasoning) test → GATE full mocks
Question 1

If '+' means '×', '−' means '+', '×' means '÷' and '÷' means '−', what is the value of: 3 + 13 − 9 × 3 ÷ 2

  1. A41
  2. B43
  3. C40
  4. D45
Show answer
Answer: (C) 40 Replace the signs: 3 × 13 + 9 ÷ 3 − 2 = 39 + 3 − 2 = 40.
Question 2

If '+' means '×', '−' means '+', '×' means '÷' and '÷' means '−', what is the value of: 5 + 11 − 18 × 6 ÷ 1

  1. A58
  2. B62
  3. C57
  4. D52
Show answer
Answer: (C) 57 Replace the signs: 5 × 11 + 18 ÷ 6 − 1 = 55 + 3 − 1 = 57.
Question 3

If '+' means '×', '−' means '+', '×' means '÷' and '÷' means '−', what is the value of: 2 + 6 − 16 × 4 ÷ 8

  1. A6
  2. B7
  3. C8
  4. D11
Show answer
Answer: (C) 8 Replace the signs: 2 × 6 + 16 ÷ 4 − 8 = 12 + 4 − 8 = 8.
Question 4

If '+' means '×', '−' means '+', '×' means '÷' and '÷' means '−', what is the value of: 5 + 16 − 45 × 9 ÷ 5

  1. A83
  2. B82
  3. C79
  4. D80
Show answer
Answer: (D) 80 Replace the signs: 5 × 16 + 45 ÷ 9 − 5 = 80 + 5 − 5 = 80.
Question 5

If '+' means '×', '−' means '+', '×' means '÷' and '÷' means '−', what is the value of: 4 + 11 − 18 × 9 ÷ 6

  1. A40
  2. B45
  3. C42
  4. D37
Show answer
Answer: (A) 40 Replace the signs: 4 × 11 + 18 ÷ 9 − 6 = 44 + 2 − 6 = 40.
Question 6

If '+' means '×', '−' means '+', '×' means '÷' and '÷' means '−', what is the value of: 8 + 19 − 12 × 3 ÷ 7

  1. A147
  2. B149
  3. C150
  4. D144
Show answer
Answer: (B) 149 Replace the signs: 8 × 19 + 12 ÷ 3 − 7 = 152 + 4 − 7 = 149.
Question 7

If '+' means '×', '−' means '+', '×' means '÷' and '÷' means '−', what is the value of: 6 + 10 − 8 × 4 ÷ 6

  1. A56
  2. B51
  3. C57
  4. D58
Show answer
Answer: (A) 56 Replace the signs: 6 × 10 + 8 ÷ 4 − 6 = 60 + 2 − 6 = 56.
Question 8

If '+' means '×', '−' means '+', '×' means '÷' and '÷' means '−', what is the value of: 7 + 18 − 72 × 8 ÷ 9

  1. A126
  2. B128
  3. C125
  4. D123
Show answer
Answer: (A) 126 Replace the signs: 7 × 18 + 72 ÷ 8 − 9 = 126 + 9 − 9 = 126.
Question 9

If '+' means '×', '−' means '+', '×' means '÷' and '÷' means '−', what is the value of: 6 + 18 − 18 × 6 ÷ 3

  1. A105
  2. B108
  3. C109
  4. D107
Show answer
Answer: (B) 108 Replace the signs: 6 × 18 + 18 ÷ 6 − 3 = 108 + 3 − 3 = 108.
Question 10

If '+' means '×', '−' means '+', '×' means '÷' and '÷' means '−', what is the value of: 9 + 14 − 28 × 7 ÷ 1

  1. A126
  2. B128
  3. C129
  4. D130
Show answer
Answer: (C) 129 Replace the signs: 9 × 14 + 28 ÷ 7 − 1 = 126 + 4 − 1 = 129.

Ready for the real thing?
Timed General Aptitude (Quantitative & Reasoning) test · 5 questions · instant rank

Start free test
Question 11

If '+' means '×', '−' means '+', '×' means '÷' and '÷' means '−', what is the value of: 7 + 5 − 4 × 2 ÷ 8

  1. A29
  2. B26
  3. C27
  4. D32
Show answer
Answer: (A) 29 Replace the signs: 7 × 5 + 4 ÷ 2 − 8 = 35 + 2 − 8 = 29.
Question 12

If '+' means '×', '−' means '+', '×' means '÷' and '÷' means '−', what is the value of: 6 + 18 − 12 × 6 ÷ 5

  1. A103
  2. B110
  3. C105
  4. D107
Show answer
Answer: (C) 105 Replace the signs: 6 × 18 + 12 ÷ 6 − 5 = 108 + 2 − 5 = 105.
Question 13

If '+' means '×', '−' means '+', '×' means '÷' and '÷' means '−', what is the value of: 9 + 18 − 10 × 5 ÷ 4

  1. A160
  2. B163
  3. C158
  4. D157
Show answer
Answer: (A) 160 Replace the signs: 9 × 18 + 10 ÷ 5 − 4 = 162 + 2 − 4 = 160.
Question 14

If '+' means '×', '−' means '+', '×' means '÷' and '÷' means '−', what is the value of: 9 + 13 − 9 × 3 ÷ 9

  1. A108
  2. B114
  3. C111
  4. D116
Show answer
Answer: (C) 111 Replace the signs: 9 × 13 + 9 ÷ 3 − 9 = 117 + 3 − 9 = 111.
Question 15

If '+' means '×', '−' means '+', '×' means '÷' and '÷' means '−', what is the value of: 9 + 8 − 20 × 4 ÷ 1

  1. A79
  2. B74
  3. C78
  4. D76
Show answer
Answer: (D) 76 Replace the signs: 9 × 8 + 20 ÷ 4 − 1 = 72 + 5 − 1 = 76.

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

More General Aptitude (Quantitative & Reasoning) topics

Number System 17 Qs Profit, Loss & Discount 17 Qs Problems on Ages 16 Qs Classification 16 Qs Simplification & Approximation 16 Qs Speed, Time & Distance 16 Qs Clocks 16 Qs Coding-Decoding 16 Qs

All GATE topics →