Question

If '+' means '−', '−' means '×', '×' means '÷' and '÷' means '+', what will come in place of the question mark (?) in the following equation?

28 − 2 + 80 × 5 ÷ 14 = ?

• A. 45
• B. 25
• C. 52
• D. 54

Answer 1

Answer:

D. 54

The value that will come in place of the question mark is 54.

1. Substitute the signs according to the given conditions:

   • Change '$-$' to '$\times$'

   • Change '$+$' to '$-$'

   • Change '$\times$' to '$\div$'

   • Change '$\div$' to '$+$'

   The original equation: $28 - 2 + 80 \times 5 \div 14 = ?$
   The new equation becomes: $28 \times 2 - 80 \div 5 + 14 = ?$

2. Solve using the BODMAS rule:

   • Division first:
     $80 \div 5 = 16$
     Equation becomes: $28 \times 2 - 16 + 14 = ?$

   • Multiplication next:
     $28 \times 2 = 56$
     Equation becomes: $56 - 16 + 14 = ?$

   • Addition and Subtraction (left to right):
     $56 - 16 = 40$
     $40 + 14 = 54$