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What will come in the place of '?' in the following equation, if 'div' and '×' are interchanged? 8+7div36×9−12=?
25
24
19
21
24
Follow BODMAS (Bracket, Of, Division, Multiplication, Addition, Subtraction) strictly after interchanging the signs.
Follow BODMAS (Bracket, Of, Division, Multiplication, Addition, Subtraction) strictly after interchanging the signs.
Interchange Signs
Replace '÷' with '×' and '×' with '÷' in the equation: 8 + 7 × 36 ÷ 9 - 12.
Apply BODMAS Rule
First perform division: 36 ÷ 9 = 4. Equation becomes 8 + 7 × 4 - 12.
Perform Multiplication
Next perform multiplication: 7 × 4 = 28. Equation becomes 8 + 28 - 12.
Final Addition and Subtraction
Perform addition: 8 + 28 = 36. Finally, subtract: 36 - 12 = 24.
A: 25 is incorrect, C: 19 is incorrect, D: 21 is incorrect, as the calculated value using BODMAS is exactly 24.
B is correct because replacing the signs and applying the BODMAS rule (36/9=4, 7*4=28, 8+28-12=24) yields 24.
Always write down the modified equation clearly before calculating; the most common error is missing the order of operations in simple arithmetic puzzles.
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