Question

What will come in the place of '?' in the following equation, if 'x' and '÷' are interchanged and '-' and '+' are interchanged? 23 ÷ 18 + 150 × 50 - 44 = ?

• A. 455
• B. 545
• C. 485
• D. 515

Answer 1

Answer:

A. 455

We are told:

• $( \times \leftrightarrow \div )$

• $( + \leftrightarrow - )$

  Rewrite the expression after interchanging signs

Given:
23 ÷ 18 + 150 × 50 - 44

After swapping:

• × → ÷

• − → +

So expression becomes:
$23 × 18 - 150 ÷ 50 + 44$

Solve using BODMAS

1. Multiplication and division first:

23 × 18 = 414

150 ÷ 50 = 3

Now expression:

414 - 3 + 44

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2. Left to right:

414 - 3 = 411

411 + 44 = 455

Final Answer: 455