Question

What will come in the place of the question mark (?) in the following equation if '+' and '-' are interchanged and 'x' and '÷' are interchanged? 90 - 6 + 69 ÷ 54 × 27 = ?

• A. -44
• B. -43
• C. -45
• D. -42

Answer 1

Answer:

D. -42

Interchange the operators:

• (+) ↔ (-)

• (\times) ↔ (\div)

  Rewrite the expression

Given:
$90 - 6 + 69 \div 54 \times 27$

After interchange:
$90 + 6 - 69 \times 54 \div 27$

Apply BODMAS

First multiplication/division:
$69 \times 54 = 3726$

$3726 \div 27 = 138$

Final calculation

$90 + 6 - 138 = 96 - 138 = -42$

Final Answer: -42