Question

What will come in the place of '?' in the following equation, if '÷' and '+' are interchanged and 'x' and -' are interchanged? 48 ×16-20÷21+7=?

• A. 259
• B. 269
• C. -269
• D. -259

Answer 1

Answer:

C. -269

Apply the given interchanges:

• ÷ and + are interchanged

• × and − are interchanged

  Original expression:

$48 \times 16 - 20 \div 21 + 7$
After interchanging signs:

$48 - 16 \times 20 + 21 \div 7$

Solve using BODMAS:

$16 \times 20 = 320$
$21 \div 7 = 3$
Now:
$48 - 320 + 3$
$48 - 320 = -272$
$-272 + 3 = -269$

Final Answer: -269