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- Question
- 4 - 4 = 17, 6 - 6 = 37, 2 - 2 = 5, 5 - 5 =?
Options- A. 27
- B. 26
- C. 20
- D. 24
- Correct Answer
- 26
ExplanationAs, 4 - 4 ? 4 x 4 + 1 = 17
6 - 6 ? 6 x 6 + 1 = 37
2 - 2 ? 2 x 2 + 1 = 5
Similarly, 5 - 5 ? 5 x 5 + 1 = 26
? ? = 26 - 1. Select the correct combination of mathematical signs to replace the * signs and to balance the given equation.
40 * 2 * 4 * 3 * 8
Options- A. + - ÷ =
- B. ÷ + = x
- C. + ÷ x =
- D. + x - = Discuss
- 2. If "T" means (x), 'U' means (-) , 'X' means (÷) and W means (+), then what will be the value of the following expression?
(50 X 2) W (28 T 4 )
Options- A. 142
- B. 158
- C. 137
- D. 163 Discuss
- 3. If '+' means 'minus', '-' means 'multiply', '÷' means 'plus' and 'x' means 'divide', then 10 x 5 ÷ 3 - 2 + 3 =?
Options- A. 5
- B. 53/3
- C. 21
- D. 36 Discuss
- 4. The sum of the ages of father and a son presently is 70 years. After 10 years, the son's age is exactly half that of the father. What are their ages now?
Options- A. 45 years, 25 years
- B. 50 years, 20 years
- C. 47 years, 23 years
- D. 50 years, 25 years Discuss
- 5. The average age of 19 boys in a class is 21 years. If the teacher's age is included, the average increases to 22 years. What is the teacher's age?
Options- A. 39 years
- B. 41 years
- C. 40 years
- D. 44 years Discuss
- 6. If S means '-', Q means 'x' , R means '÷' and P means '+' then
1 P 45 R 2 Q 2 S 4 =?
Options- A. 40
- B. 42
- C. 36
- D. 46 Discuss
- 7. If '@' means 'x', 'c' means '÷' % means (+) and '$' means '-', then 6%12C3@8 $ 3 =?
Options- A. 37
- B. 35
- C. 39
- D. 33 Discuss
- 8. 6 5 4 = 34
Options- A. - and +
- B. x and +
- C. ÷ and x
- D. x and - Discuss
- 9. 65 40 11 = 36
Options- A. - and +
- B. x and ÷
- C. ÷ and +
- D. + and x Discuss
- 10. Which sequence of mathematical symbols can replace *in the given equation to balance the equation?
7 * 7 * 2 * 1 = 12
Options- A. x - ÷
- B. + - x
- C. x - +
- D. + x - Discuss
Mathematical Operations problems
Search Results
Correct Answer: ÷ + = x
Explanation:
Given, 40* 2* 4 * 3 * 8
Let us check all the options one by one.
From option (a), putting the signs in given equation, we get
40 + 2 - 4 ÷ 3
= 8 ? 42 - 4/3 = 8
? 126 - 4 = 24 ? 122 = 24
? L H S ? R H S
So, option (a) is incorrect.
From option (b), putting the signs in given equation, we get
40 ÷ 2 + 4 = 3 x 8
? 20 + 4 = 24 ? 24 = 24
LHS = RHS
Hence, option (b) is correct and there is no need to check remaining options.
Correct Answer: 137
Explanation:
Given expression, (50 x 2) W (28 T 4)
After interchanging the letters with symbols, we get
(50 ÷ 2) + (28 x 4) = 25 + 112 = 137
Correct Answer: 5
Explanation:
? = 10 x 5 ÷ 3 - 2 + 3
= 10 ÷ 5 + 3 x 2 - 3
Apply the rule BODMAS
Do things in Brackets First
(Powers, Roots) before Multiply, Divide, Add or Subtract.
Multiply or Divide before you Add or Subtract
= 10 ÷ 5 + 3 x 2 - 3
= 2 + 3 x 2 - 3
Addition
= 2 + 6 - 3
Subtraction
= 8 - 3 = 5
Correct Answer: 50 years, 20 years
Explanation:
Correct Answer: 41 years
Explanation:
The average age of 19 boys in a class = 21 years
Sum total of ages of 19 boys = 19 × 21 years = 399 years
The average age of 19 boys and teacher in a class = 21 years
Sum total of ages of 19 boys and teacher = 20 × 22 years = 440 years
? Age of teacher = Sum total of ages of 19 boys and teacher - Sum total of ages of 19 boys
Age of teacher = ( 440 ? 399 ) years = 41 years
Correct Answer: 42
Explanation:
After replacing the sign according to question
1 P 45 R 2 Q 2 S 4
Apply the BODMAS Rule
= 1 + 45 ÷ 2 x 2 - 4
= 1 + 22.5 x 2 - 4
= 1 + 45 - 4 = 42
Correct Answer: 35
Explanation:
? 6%12C3@8 $ 3 = ?
After replacing the sign according to the question
? 6 + 12 ÷ 3 x 8 - 3 = ?
Apply the BODMAS Rule
? 6 + 4 x 8 - 3 = ?
? 6 + 32 - 3 = ?
? 38 - 3 = ?
? ? = 35
Correct Answer: x and +
Explanation:
Let us check all the options one by one.
From option (a),
6 - 5 + 4 = 34 (using VBODMAS rule)
? 10 - 5 = 34 ? 5 = 34
? LHS ? RHS
So, option (a) is incorrect
From option (b),
6 x 5 + 4 = 34 (using VBODMAS rule)
? 30 + 4 = 34 ? 34 = 34
? LHS = RHS
So, option (b) gives us the correct answer and hence, there is no need to check remaining options.
Correct Answer: - and +
Explanation:
Let us check all the options one by one.
From option (a),
65 - 40 + 11 = 36 ? 76 - 40 = 36
? 36 = 36 ? LHS = RHS
So, option (a) is correct and hence there is no need to check remaining options.
Correct Answer: + - x
Explanation:
Given, 7 * 7 * 2 * 1 = 12
Let us check all the options one by one.
From option (a), putting the signs in given equation, we get
7 x 7 - 2 ÷ 1 = 12 ? 7 x 7 - 2 = 12
? 49 - 2 = 12 ? 47 = 12
? LHS ? RHS
So, option (a) is incorrect.
From option (b), putting the signs in given equation, we get
7 + 7 - 2 x 1 = 12 ? 7 + 7 - 2 = 12
? 14 - 2 = 12 ? 12 = 12
Hence, option (b) is correct and there is no need to check remaining options .
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