Question

What will come in the place of the question mark (?) in the following equation, if '+' and '÷' are interchanged and '-' and 'x' are interchanged? 18 ÷ 15 + 5 x 3 - 4 = ?

• A. 5
• B. 9
• C. 1
• D. 13

Answer 1

Answer:

B. 9

Apply the given interchanges:

• ‘+’ ↔ ‘÷’

• ‘−’ ↔ ‘×’

So the expression:
18 ÷ 15 + 5 × 3 − 4

becomes:
18 + 15 ÷ 5 − 3 × 4

Now solve using BODMAS:

15 ÷ 5 = 3
3 × 4 = 12

So:
18 + 3 − 12 = 21 − 12 = 9

Final Answer:

9