What will come in the place of the question mark (?) in the following equation if ‘+’ and ‘−’ are interchanged and ‘×’ and ‘÷’ are interchanged?
15 − 5 + 18 × 6 ÷ 3 = ?

This question was previously asked in
RPF Constable 2024 Official Paper (Held On 03 Mar, 2025 Shift 2)
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  1. 11
  2. 16
  3. 1
  4. 29

Answer (Detailed Solution Below)

Option 1 : 11
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Detailed Solution

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Given equation: 15 − 5 + 18 × 6 ÷ 3 = ?

After interchanging ‘+’ and ‘−’ and ‘×’ and ‘÷’, we get:

15 + 5 − 18 ÷ 6 × 3 = ?

= 15 + 5 − 3 × 3

= 15 + 5 − 9

= 20 − 9

= 11

Hence, the correct answer is "Option 1".

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