Question

What will come in place of the question mark (?) in the following equation if '+' and '-' are interchanged and '*' and '' are interchanged? 12 ÷ 2 × 6 - 11 + 12 = ?

• A. 6
• B. 9
• C. 5
• D. 3

Answer 1

Answer:

D. 3

First apply the given interchanges:

• $( + \leftrightarrow - )$

• $( \times \leftrightarrow \div )$

  Original expression:

  $12 \div 2 \times 6 - 11 + 12$
  

  After interchange:

  $12 \times 2 \div 6 + 11 - 12$
  

  Now solve (BODMAS):

  $12 \times 2 = 24$
  $24 \div 6 = 4$
  $4 + 11 = 15$
  $15 - 12 = 3$

  Final Answer:

3