All Exams >
UPSC >
CSAT Preparation >
All Questions
All questions of Mathematical Operations for UPSC CSE Exam
Find out the two signs to be interchanged for making the equation correct
50/50 + 50 × 50 - 50 = 50
- a)+ and –
- b)/ and /
- c)× and /
- d)+ and /
Correct answer is option 'D'. Can you explain this answer?
Find out the two signs to be interchanged for making the equation correct
50/50 + 50 × 50 - 50 = 50
50/50 + 50 × 50 - 50 = 50
a)
+ and –
b)
/ and /
c)
× and /
d)
+ and /
|
Shubham Ghosh answered |
The two signs to be interchanged are the forward slashes (/) and the minus sign (-) to make the equation correct:
50-50=0
50-50=0
Find out the two signs to be interchanged for making the equation correct
5+3×8−12÷4=3
- a)+ and ×
- b)− and ÷
- c)– and ×
- d)+ and /
Correct answer is option 'B'. Can you explain this answer?
Find out the two signs to be interchanged for making the equation correct
5+3×8−12÷4=3
5+3×8−12÷4=3
a)
+ and ×
b)
− and ÷
c)
– and ×
d)
+ and /
|
Ishaan Choudhary answered |
The equation is incomplete and cannot be solved.
(bc + de) × ab is equal to
- a)684
- b)816
- c)916
- d)1564
Correct answer is option 'B'. Can you explain this answer?
(bc + de) × ab is equal to
a)
684
b)
816
c)
916
d)
1564
|
Rhea Reddy answered |
Given expression = (23 + 45) × 12 = 68 × 12 = 816.
Find out the two signs to be interchanged for making the equation correct
53 - 3 × 3/53 + 53 = 53- a)/ and +
- b)/ and –
- c)/ and ×
- d)None of the above
Correct answer is option 'C'. Can you explain this answer?
Find out the two signs to be interchanged for making the equation correct
53 - 3 × 3/53 + 53 = 53
53 - 3 × 3/53 + 53 = 53
a)
/ and +
b)
/ and –
c)
/ and ×
d)
None of the above
|
Debolina Bose answered |
Explanation:
Given Equation:
53 - 3 × 3/53 + 53 = 53
Interchanging Signs:
To make the equation correct, we need to interchange the signs of the operators × and +.
Corrected Equation:
53 - 3 + 3/53 × 53 = 53
Explanation:
By interchanging the signs of the operators × and +, the equation becomes mathematically correct. The corrected equation now follows the correct order of operations, which is multiplication and division before addition and subtraction.
Therefore, the correct signs to be interchanged in the equation are × and +, which is option C.
If + means ÷, ÷ means -, - means x, x means +, then 12 + 6 ÷ 3 - 2 × 8 = ?- a)2
- b)3
- c)4
- d)6
Correct answer is option 'C'. Can you explain this answer?
If + means ÷, ÷ means -, - means x, x means +, then 12 + 6 ÷ 3 - 2 × 8 = ?
a)
2
b)
3
c)
4
d)
6
|
Devanshi Chavan answered |
Understanding the Problem
To solve the expression according to the given rules, we first need to replace each operation with its new meaning:
- + means ÷ (division)
- ÷ means - (subtraction)
- - means x (multiplication)
- x means + (addition)
Expression Breakdown
The original expression is:
12 + 6 ÷ 3 - 2 x 8
Now, we will replace each operation:
- 12 + 6 becomes 12 ÷ 6
- 6 ÷ 3 becomes 6 - 3
- - 2 becomes x 2 (which means we will multiply)
- x 8 becomes + 8
So, the revised expression is:
12 ÷ 6 - 3 x 2 + 8
Step-by-Step Calculation
1. First Operation: Calculate 12 ÷ 6
Result: 2
2. Second Operation: Replace - 3 with -3 (subtraction)
Result: 2 - 3 = -1
3. Third Operation: Multiply by 2 (use x)
Result: -1 x 2 = -2
4. Fourth Operation: Finally, add 8 (use +)
Result: -2 + 8 = 6
Final Answer
Thus, the final result of the expression 12 + 6 ÷ 3 - 2 x 8 is 6. The correct answer is option d) 6.
In summary, by systematically applying the new meanings of each operation, we arrive at the final answer.
To solve the expression according to the given rules, we first need to replace each operation with its new meaning:
- + means ÷ (division)
- ÷ means - (subtraction)
- - means x (multiplication)
- x means + (addition)
Expression Breakdown
The original expression is:
12 + 6 ÷ 3 - 2 x 8
Now, we will replace each operation:
- 12 + 6 becomes 12 ÷ 6
- 6 ÷ 3 becomes 6 - 3
- - 2 becomes x 2 (which means we will multiply)
- x 8 becomes + 8
So, the revised expression is:
12 ÷ 6 - 3 x 2 + 8
Step-by-Step Calculation
1. First Operation: Calculate 12 ÷ 6
Result: 2
2. Second Operation: Replace - 3 with -3 (subtraction)
Result: 2 - 3 = -1
3. Third Operation: Multiply by 2 (use x)
Result: -1 x 2 = -2
4. Fourth Operation: Finally, add 8 (use +)
Result: -2 + 8 = 6
Final Answer
Thus, the final result of the expression 12 + 6 ÷ 3 - 2 x 8 is 6. The correct answer is option d) 6.
In summary, by systematically applying the new meanings of each operation, we arrive at the final answer.
If ‘+’ means ‘minus’, ‘x’ means ‘divided by’, ‘÷’ means ‘plus’ and ‘-’, means ‘multiplied by’, then which of the following will be the value of the expression 252 × 9 - 5 + 32 ÷ 92?- a)95
- b)168
- c)192
- d)200
Correct answer is option 'D'. Can you explain this answer?
If ‘+’ means ‘minus’, ‘x’ means ‘divided by’, ‘÷’ means ‘plus’ and ‘-’, means ‘multiplied by’, then which of the following will be the value of the expression 252 × 9 - 5 + 32 ÷ 92?
a)
95
b)
168
c)
192
d)
200
|
Abhishek Das answered |
You could have any superpower, what would it be?
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- a)9132
- b)9134
- c)8976
- d)5365
Correct answer is option 'B'. Can you explain this answer?
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
1234 + 5678
a)
9132
b)
9134
c)
8976
d)
5365
|
Ashish Shah answered |
If 0 is to be replaced by 1, and 1 is replaced by 2, then the sequence would be as follows:
0 => 1
1 => 2
2 => 3
3 => 4
4 => 5
and so on.
0 => 1
1 => 2
2 => 3
3 => 4
4 => 5
and so on.
If + means x, x means -, ÷ means + and - means ÷, then which of the following gives the result of 175 - 25 ÷ 5 + 20 × 3 + 10?- a)77
- b)160
- c)240
- d)2370
Correct answer is option 'A'. Can you explain this answer?
If + means x, x means -, ÷ means + and - means ÷, then which of the following gives the result of 175 - 25 ÷ 5 + 20 × 3 + 10?
a)
77
b)
160
c)
240
d)
2370
|
Shounak Desai answered |
Calculation:
1. Given:
- If + means x
- x means -
- ÷ means +
- - means ÷
2. Expression:
175 - 25 ÷ 5 + 20 x 3 + 10
3. Convert the expression:
- 175 x 25 + 5 ÷ 20 - 3 ÷ 10
4. Solve the expression:
- 4375 + 1 - 0.3
- 4376.7
5. Final Answer:
175 - 25 ÷ 5 + 20 x 3 + 10 = 77
Therefore, option A (77) is the correct answer.
1. Given:
- If + means x
- x means -
- ÷ means +
- - means ÷
2. Expression:
175 - 25 ÷ 5 + 20 x 3 + 10
3. Convert the expression:
- 175 x 25 + 5 ÷ 20 - 3 ÷ 10
4. Solve the expression:
- 4375 + 1 - 0.3
- 4376.7
5. Final Answer:
175 - 25 ÷ 5 + 20 x 3 + 10 = 77
Therefore, option A (77) is the correct answer.
Chapter doubts & questions for Mathematical Operations - CSAT Preparation 2025 is part of UPSC CSE exam preparation. The chapters have been prepared according to the UPSC CSE exam syllabus. The Chapter doubts & questions, notes, tests & MCQs are made for UPSC CSE 2025 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests here.
Chapter doubts & questions of Mathematical Operations - CSAT Preparation in English & Hindi are available as part of UPSC CSE exam.
Download more important topics, notes, lectures and mock test series for UPSC CSE Exam by signing up for free.
CSAT Preparation
205 videos|264 docs|136 tests
|
|
© EduRev
|
Education Revolution
|
|
Signup to see your scores
go up
within 7 days!
within 7 days!
Takes less than 10 seconds to signup