Test: Mathematical Operations - 1 - UPSC MCQ

# Test: Mathematical Operations - 1 - UPSC MCQ

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## 10 Questions MCQ Test CSAT Preparation - Test: Mathematical Operations - 1

Test: Mathematical Operations - 1 for UPSC 2024 is part of CSAT Preparation 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 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Mathematical Operations - 1 below.
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Test: Mathematical Operations - 1 - Question 1

### 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

### 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

Replacing symbols the result will be 8.

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Test: Mathematical Operations - 1 - Question 3

### 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

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

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

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

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

Test: Mathematical Operations - 1 - Question 7

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

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

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

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.

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215 videos|139 docs|151 tests