Question

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

$(7 - 4) \div (9 - 3) \times (9 + 3) = ?$

• A. 12
• B. 11
• C. 22
• D. 6

Answer 1

Answer:

C. 22

The value that will come in place of the question mark is 22.

1. Interchange the signs:

   • Swap − and +

   • Swap ÷ and ×

   $\text{Original Equation: } (7 - 4) \div (9 - 3) \times (9 + 3) = ?$
   $\text{New Equation: } (7 + 4) \times (9 + 3) \div (9 - 3) = ?$

2. Solve inside the parentheses first:

   • $(7 + 4) = 11$

   • $(9 + 3) = 12$

   • $(9 - 3) = 6$

3. Substitute values and compute using BODMAS/order of operations:
   $11 \times 12 \div 6 = ?$
   Perform the division first:
   $12 \div 6 = 2$
   Then multiply:
   $11 \times 2 = 22$