Explore Exams
Login Signup
Sign in Open App
UPSC Exam  >  UPSC Tests  >  Test: Mathematical Operations - 1 - UPSC MCQ

Test: Mathematical Operations - 1 - UPSC MCQ


Test Description

10 Questions MCQ Test - Test: Mathematical Operations - 1

Test: Mathematical Operations - 1 for UPSC 2025 is part of UPSC preparation. The Test: Mathematical Operations - 1 questions and answers have been prepared according to the UPSC exam syllabus.The Test: Mathematical Operations - 1 MCQs are made for UPSC 2025 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Mathematical Operations - 1 below.
Solutions of Test: Mathematical Operations - 1 questions in English are available as part of our course for UPSC & Test: Mathematical Operations - 1 solutions in Hindi for UPSC course. Download more important topics, notes, lectures and mock test series for UPSC Exam by signing up for free. Attempt Test: Mathematical Operations - 1 | 10 questions in 12 minutes | Mock test for UPSC preparation | Free important questions MCQ to study for UPSC Exam | Download free PDF with solutions
Test: Mathematical Operations - 1 - Question 1
Save

In the given question if + means -, × means /, - means + and / means × then find out the answer of the following question.

23 + 7 - 7 + 8 + 4 - 6

Detailed Solution for Test: Mathematical Operations - 1 - Question 1

23 - 7 + 7 - 8 - 4 + 6 = 17. So option C Is correct.

Test: Mathematical Operations - 1 - Question 2
Save

Directions for questions − If
‘+’ = ’×’
‘-‘ = ’+’
‘×’ = ’/’
’/’ = ‘-‘
Then answer the following questions based on this information
7/1 - 3 × 3 + 2 =

Detailed Solution for Test: Mathematical Operations - 1 - Question 2

  • So the expression
    7 / 1 – 3 × 3 + 2

    becomes
    7 – 1 + 3 / 3 × 2

    Now evaluate using standard order of operations (division and multiplication first, then addition and subtraction left to right):

  • 3 / 3 = 1

  • 1 × 2 = 2

  • 7 – 1 = 6

  • 6 + 2 = 8

  • Answer: 8 (option b)

Clear all your doubts with EduRev
Test: Mathematical Operations - 1 - Question 3
Save

Find out the two signs to be interchanged for making the equation correct
5+3×8−12÷4=3

Detailed Solution for Test: Mathematical Operations - 1 - Question 3

On interchanging − and ÷, we get the equation as
5+3×8÷12−4=3
or 5+3×2/3−4=3
or 3 = 3, which is true.

Test: Mathematical Operations - 1 - Question 4
Save

If + means -, × means /, - means + and / means × then find out the answer of the following question.
77 - 78 - 107
Detailed Solution for Test: Mathematical Operations - 1 - Question 4

77 + 78 + 107 = 262.

Test: Mathematical Operations - 1 - Question 5
Save

Select the correct combination of mathematical signs to sequentially replace the * signs and to balance the following equation

11 * 15 * 78 * 6 * 18 * 160
Detailed Solution for Test: Mathematical Operations - 1 - Question 5

1) ×, +, ÷, -, =

Given expression: 11 * 15 * 78 * 6 * 18 * 160

After replacing the * by the signs, we get:

11 × 15 + 78 ÷ 6 - 18 = 160

⇒ 165 + 13 – 18 = 160

⇒ 178 – 18 = 160

⇒ 160 = 160

2) +, ×, ÷, -, =

Given expression: 11 * 15 * 78 * 6 * 18 * 160

After replacing the * by the signs, we get:

11 + 15 × 78 ÷ 6 - 18 = 160

⇒ 11 + 15 × 13 – 18 = 160

⇒ 11 + 195 – 18 = 160

⇒ 205 – 18 = 160

⇒ 187 ≠ 160

3) ×, +, -, ÷, =

Given expression: 11 * 15 * 78 * 6 * 18 * 160

After replacing the * by the signs, we get:

11 × 15 + 78 - 6 ÷ 18 = 160

⇒ 165 + 78 – 0.33 = 160

⇒ 243 – 0.33 = 160

⇒ 242.67 ≠ 160

4)+, ×, -, ÷, =

Given expression: 11 * 15 * 78 * 6 * 18 * 160

After replacing the * by the signs, we get:

11 + 15 × 78 - 6 ÷ 18 = 160

⇒ 11 + 1170 – 0.33 = 160

⇒ 1181 – 0.33 = 160

⇒ 1180.67 ≠ 160

Test: Mathematical Operations - 1 - Question 6
Save

Find out the two signs to be interchanged for making the equation correct
53 - 3 × 3/53 + 53 = 53
Detailed Solution for Test: Mathematical Operations - 1 - Question 6

First, evaluate the original equation:

  • 3 × 3 / 53 = 9 / 53 (multiplication and division from left to right)
  • 53 - 9 / 53 + 53
  • 9 / 53 ≈ 0.1698
  • 53 - 0.1698 + 53 ≈ 105.8302
  • This does not equal 53, so the equation is incorrect as is.

Now, test each option by interchanging the signs:

a) Interchange / and +:

  • Original: 53 - 3 × 3 / 53 + 53
  • New: 53 - 3 × 3 + 53 / 53
  • 3 × 3 = 9
  • 53 / 53 = 1
  • 53 - 9 + 1
  • 53 - 9 = 44
  • 44 + 1 = 45
  • 45 ≠ 53

b) Interchange / and + (same as a, likely a typo in options):

  • Same as above, result is 45 ≠ 53

c) Interchange / and ×:

  • Original: 53 - 3 × 3 / 53 + 53
  • New: 53 - 3 / 3 × 53 + 53
  • 3 / 3 = 1
  • 1 × 53 = 53
  • 53 - 53 + 53
  • 53 - 53 = 0
  • 0 + 53 = 53
  • 53 = 53

This matches the equation.

d) None of the above: Not applicable since c) works.

Test: Mathematical Operations - 1 - Question 7
Save

Find out the two signs to be interchanged for making the equation correct
50/50 + 50 × 50 - 50 = 50
Detailed Solution for Test: Mathematical Operations - 1 - Question 7

By making changes as suggested in option d, we will get the solution as given on the RHS side.

Test: Mathematical Operations - 1 - Question 8
Save

If 0 is to be replaced by 1, 1 is replaced by 2……. 7 is replaced by 8 and 8 is replaced by 9 and 9 is replaced by 0. Then answer the following question.
1234 + 5678
Detailed Solution for Test: Mathematical Operations - 1 - Question 8

By changing the numbers, we get 2345 + 6789 = 9134.

Test: Mathematical Operations - 1 - Question 9
Save

If + means -, × means /, - means + and / means × then find out the answer of the following question.
(130 × 13) × 5 - 10
Detailed Solution for Test: Mathematical Operations - 1 - Question 9

(130/13) /5 + 10 = 10/5 + 10 = 2 + 10 = 12

Test: Mathematical Operations - 1 - Question 10
Save

In the given question if + means -, × means /, - means + and / means × then find out the answer of the following question.

67 + 45 - 4 + 7
Detailed Solution for Test: Mathematical Operations - 1 - Question 10

67 - 45 + 4 - 7 = 19.

Information about Test: Mathematical Operations - 1 Page
In this test you can find the Exam questions for Test: Mathematical Operations - 1 solved & explained in the simplest way possible. Besides giving Questions and answers for Test: Mathematical Operations - 1, EduRev gives you an ample number of Online tests for practice
Download as PDF

Important Questions for Mathematical Operations - 1

Find all the important questions for Mathematical Operations - 1 at EduRev.Get fully prepared for Mathematical Operations - 1 with EduRev's comprehensive question bank and test resources. Our platform offers a diverse range of question papers covering various topics within the Mathematical Operations - 1 syllabus. Whether you need to review specific subjects or assess your overall readiness, EduRev has you covered. The questions are designed to challenge you and help you gain confidence in tackling the actual exam. Maximize your chances of success by utilizing EduRev's extensive collection of Mathematical Operations - 1 resources.

Mathematical Operations - 1 MCQs with Answers

Prepare for the Mathematical Operations - 1 within the UPSC exam with comprehensive MCQs and answers at EduRev. Our platform offers a wide range of practice papers, question papers, and mock tests to familiarize you with the exam pattern and syllabus. Access the best books, study materials, and notes curated by toppers to enhance your preparation. Stay updated with the exam date and receive expert preparation tips and paper analysis. Visit EduRev's official website today and access a wealth of videos and coaching resources to excel in your exam.

Online Tests for Mathematical Operations - 1

Practice with a wide array of question papers that follow the exam pattern and syllabus. Our platform offers a user-friendly interface, allowing you to track your progress and identify areas for improvement. Access detailed solutions and explanations for each test to enhance your understanding of concepts. With EduRev's Online Tests, you can build confidence, boost your performance, and ace Mathematical Operations - 1 with ease. Join thousands of successful students who have benefited from our trusted online resources.
© EduRev
Education Revolution
Signup to see your scores go up within 7 days!
Access 1000+ FREE Docs, Videos and Tests
Takes less than 10 seconds to signup