Question

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

12 − 104 × 8 + 5 ÷ 4 = ?

• A. 5
• B. 7
• C. 9
• D. 11

Answer 1

Answer:

A. 5

The value that will come in place of the question mark is 5.

1. Interchange the signs according to the given conditions:

   • Interchange + and − (swap their positions)

   • Interchange × and ÷ (swap their positions)

   The original equation:
   $12 - 104 \times 8 + 5 \div 4 = ?$The new equation after interchanging:
   $12 + 104 \div 8 - 5 \times 4 = ?$

2. Solve using the BODMAS rule:

   • Division first:
     $104 \div 8 = 13$
     Equation becomes: $12 + 13 - 5 \times 4 = ?$

   • Multiplication next:
     $5 \times 4 = 20$
     Equation becomes: $12 + 13 - 20 = ?$

   • Addition and Subtraction:
     $12 + 13 = 25$
     $25 - 20 = 5$