Question

What will come in the place of '?' in the following equation, if '+' and '—' are interchanged and 'x' and '÷' are interchanged? 14 ÷ 7 - 27 × 9 + 12=?

• A. 79
• B. 89
• C. 81
• D. 71

Answer 1

Answer:

B. 89

Interchange the operators:

• (+) ↔ (−)

• (×) ↔ (÷)

  Given expression:

$14 ÷ 7 - 27 × 9 + 12$

After interchange:
$14 × 7 + 27 ÷ 9 - 12$
Perform × and ÷

$14 × 7 = 98$

$27 ÷ 9 = 3$

So:
$98 + 3 - 12$

Simplify

$98 + 3 = 101$

$101 - 12 = 89$

Final Answer: 89