Question

What will come in the place of '?' in the following equation, if '+' and 'x' are interchanged and '-' and '÷' are interchanged? 17 + 77 -7 x 37 ÷ 47 =

• A. 187
• B. 167
• C. 157
• D. 177

Answer 1

Answer:

D. 177

We interchange the operators simultaneously as instructed:

• (+) ↔ ( \times )

• (−) ↔ (÷)

  Original expression

$17 + 77 - 7 \times 37 ÷ 47$

After interchanging operators

• (+) becomes ( \times )

• (−) becomes ( ÷ )

• ( \times ) becomes (+)

• ( ÷ ) becomes (−)

So the new expression is:
$17 \times 77 ÷ 7 + 37 - 47$

Solve using BODMAS

$17 \times 77 = 1309$
$1309 ÷ 7 = 187$
$187 + 37 = 224$
224 - 47 = 177