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Question

If ‘P’ stands for ‘×’ , ‘Q’ stands for ‘÷’, ‘R’ stands for ‘−’ and ‘S’ stands for ‘+’, then what will come in place of the question mark (?) in the following equation?
70 Q 2 R 5 P 3 S 18 = ?

This question was previously asked in
RRB ALP 2025 CBT 2 Wiremen Question Paper (28-Jul-2026) (Shift 2)
The correct answer is
38

To solve the given equation, we first substitute the symbols with their corresponding mathematical operations based on the provided key.

Symbol Substitution Mapping

Symbol Operation
P ×
Q ÷
R -
S +

Equation Transformation

The given equation is:

\(70 Q 2 R 5 P 3 S 18 = ?\)

Substituting the symbols:

\(70 ÷ 2 - 5 × 3 + 18 = ?\)

Step-by-Step Calculation using BODMAS

We use the order of operations (BODMAS/PEMDAS: Brackets, Orders, Division/Multiplication, Addition/Subtraction) to solve the equation.

  1. Division: Perform the division first.

    \( 70 \div 2 = 35 \)

    The equation becomes: \(35 - 5 × 3 + 18 = ?\)

  2. Multiplication: Perform the multiplication next.

    \( 5 \times 3 = 15 \)

    The equation becomes: \(35 - 15 + 18 = ?\)

  3. Addition/Subtraction: Perform subtraction and addition from left to right.

    First, subtraction: \( 35 - 15 = 20 \)

    Then, addition: \( 20 + 18 = 38 \)

Therefore, the value of the equation is 38.

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Important Questions from Maths Operations

  1. If 37 D 18 E 84 F 21 = 51 and 57 D 28 E 90 F 15 = 79, then 14 D 17 E 8 F 4 = ?
  2. This question is based on the five, three-digit numbers given below.

    (Left) 194 582 419 149 825 (Right)
    (Example- 697 – First digit = 6, second digit = 9 and third digit = 7)

    What will be the resultant if the third digit of the highest number is added to the second digit of the lowest number?
  3. If 1 is added to each odd digit and 2 is subtracted from each even digit in the number 4813576, what will be the difference between the highest and the lowest digits in the number thus formed?
  4. If '+' means '-', '-' means '×', '×' means '÷', '÷' means '+', then what will come in place of the question mark (?) in the following equation?
    316 - 2 ÷ 37 + 436 × 4 = ?
  5. If 1 is added to each odd digit and 1 is subtracted from each even digit in the number 21673458, what will be the product of the greatest and smallest digit in the new number thus formed?
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