Question
If ‘A’ stands for ‘÷’, ‘B’ stands for ‘×’, ‘C’ stands for ‘+’, and ‘D’ stands for ‘−’, what will come in place of the question mark (?) in the following equation?
18 A 2 B 5 C 7 D 9 = ?
The correct answer is
43
Symbol Substitution and Equation Evaluation
The problem requires substituting given symbols with mathematical operators and then solving the resulting equation.
The given substitutions are:
- A = ÷
- B = ×
- C = +
- D = −
The equation is: $18 A 2 B 5 C 7 D 9 = ?$
Applying Operator Substitutions
Substitute the symbols in the equation with their corresponding operators:
$18 ÷ 2 × 5 + 7 − 9$
Step-by-Step Calculation
Evaluate the expression using the standard order of operations (BODMAS/PEMDAS: Brackets, Orders, Division/Multiplication, Addition/Subtraction).
- Division: Perform the division first. $18 \div 2 = 9$ The equation becomes: $9 × 5 + 7 − 9$
- Multiplication: Perform the multiplication next. $9 \times 5 = 45$ The equation becomes: $45 + 7 − 9$
- Addition: Perform the addition. $45 + 7 = 52$ The equation becomes: $52 − 9$
- Subtraction: Perform the final subtraction. $52 - 9 = 43$
Therefore, the result of the equation is 43.
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Important Questions from Maths Operations
- 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 = ?
- 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? - 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?
- If '+' means '-', '-' means '×', '×' means '÷', '÷' means '+', then what will come in place of the question mark (?) in the following equation?
316 - 2 ÷ 37 + 436 × 4 = ? - 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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