Question

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

$(13 \div 13 + 13) \times (10 - 3) = ?$

• A. 98
• B. 13
• C. 12
• D. 26

Answer 1

Answer:

C. 12

The value that will come in place of the question mark is 12.

1. Interchange the signs:

   • Swap − and +

   • Swap ÷ and ×

   $\text{Original Equation: } (13 \div 13 + 13) \times (10 - 3) = ?$
   $\text{New Equation: } (13 \times 13 - 13) \div (10 + 3) = ?$

2. Solve the values inside the brackets (BODMAS rule):

   • First bracket: $(13 \times 13 - 13) = 169 - 13 = 156$

   • Second bracket: $(10 + 3) = 13$

3. Perform the final division:
   $156 \div 13 = 12$