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Question

If + means ×, × means −, − means ÷, and ÷ means +, what will be the value of the given expression?

24 – 4 + 18 × 3 ÷ 7

This question was previously asked in
PYST : General Awareness - SSC Stenographer 2024 (Tier-I) (10-Dec-2024) (Shift 2)
The correct answer is
112

Let's solve the given expression by replacing the operators according to the given conditions:

  • + means ×
  • × means −
  • − means ÷
  • ÷ means +

The given expression is: 24 – 4 + 18 × 3 ÷ 7

Replacing the operators as per the given conditions, we get:

24 ÷ 4 × 18 − 3 + 7

Now, following the order of operations (division, multiplication, subtraction, and addition):

  1. Division: 24 ÷ 4 = 6
  2. Multiplication: 6 × 18 = 108
  3. Subtraction: 108 − 3 = 105
  4. Addition: 105 + 7 = 112

Therefore, the value of the expression is 112.

The step-by-step solution clearly shows how replacing the operators and applying the BODMAS rule leads to the final answer. Understanding the order of operations is crucial in solving this type of mathematical puzzle. Each step is meticulously explained, ensuring clarity and ease of understanding for the student. The systematic approach allows for easy verification and prevents common errors students might make when attempting similar questions. The solution highlights the importance of careful substitution and precise calculation, emphasizing a methodological approach to problem-solving. The explanation ensures that the student not only gets the right answer but also understands the underlying logic and process involved in solving the problem. The solution also demonstrates a strong understanding of mathematical notation and clearly shows the calculations performed at each stage.

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Similar Questions

  1. The two expressions on either side of the equal sign will have the same value if two numbers on the left-hand side are interchanged and two signs on the right-hand side are interchanged. 

    What are those two numbers (not digits) and the two signs? 

    4 × 3 ÷ 6 + 2 - 8 = 10 + 2 × 3 ÷ 5 - 18

  2. Which of the following equations is correct when the numbers 12 and 6 are interchanged and the signs ÷ and + are interchanged?
  3. Which two numbers (not digits) and which two signs should be interchanged to yield the value ‘zero’ for the following expression?

    13 + 65 ÷ 2 × 8 – 21

  4. At a banquet, every 2 people shared a cake, every 6 people shared a bowl of soup, and every 8 people shared a platter of fruit. There were a total of 42 items. How many people were present at the banquet?
  5. If + = -, - = *, * = /, / = +;then,
    what is 8+ (3-2)* 4/1?
  6. If \(+\) means \(-\), \(\div\) means \(+\), \(-\) means \(\times\), and \(\times\) means \(\div\), then,
    what is \(25 - 3 \div 5 + 10\)?

  7. Which two numbers (not digits) and which two signs should be interchanged to make the following equation correct?

    33 – 15 × 4 + 9 ÷ 11 = 6

  8. What will come in place of the question mark (?) in the following equation if ‘+’ and ‘–’ are interchanged and ‘×’ and ‘÷’ are interchanged?

    3 ÷ 4 × 2 − 1 + 5 = ?

  9. If A means ‘+’, B means ‘×’, C means ‘−' and D means ‘÷’, then what will be the value of the following expression?

    16 D 4 A 4 B 2 C 2

  10. Which two signs need to be interchanged to make the following equation correct?
    {(78 + 70) − (6 × 2))} ÷ 2 = 10


Important Questions from Mathematical Operations

  1. Select the set, from the given options, in which the numbers are related in the same way as are the numbers of the following sets.

    (NOTE: Operations should be performed on the whole numbers, without breaking down the numbers into its constituent digits. E.g. 13 – Operations on 13 such as adding/subtracting/multiplying etc. to 13 can be performed. Breaking down 13 into 1 and 3 and then performing mathematical operations on 1 and 3 is not allowed.)

    (6, 13, 78)

    (5, 22, 110)

  2. If + means -, - means ×, × means ÷, ÷ means +, then what will come in place of the question mark (?) in the following equation?

    28 - 6 ÷ 4 + 14 × 14 = ?

  3. In the following number-pairs, the second number is obtained by applying certain mathematical operations to the first number. Which numbers should replace X and Y so that the pattern followed by the two numbers on the left side of :: is the same as that on the right side of :: ?

    (NOTE: Operations should be performed on the whole numbers, without breaking down the numbers into its constituent digits. E.g. 13 Operations on 13 such as adding/subtracting /multiplying etc. to 13 can be performed. Breaking down 13 into 1 and 3 and then performing mathematical operations on 1 and 3 is not allowed.)

    X : 649 :: 956 : Y

  4. Which two numbers should be interchanged to make the given equation correct?

    75 ÷ 5 + 15 × 4 - 17 × 3 + (60 ÷ 6) × 10 = 100

    (Note: Interchange should be done of the entire number and not individual digits of a given number.)

  5. If '+' means minus, '-' means multiplication, '÷' means plus, and 'x' means division, then solve the equation: 
    15 - 3 + 10 x 5 ÷ 5

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