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 If ‘A’ stands for ‘×’, ‘B’ stands for ‘−’, ‘C’ stands for ‘+’, and ‘D’ stands for ‘÷’, then the
 resultant of which of the following will be 9?

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RRB NTPC Graduate Level CBT-I Official Paper (Held On: 06 Jun, 2025 Shift 2)
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  1. 8 A 3 C 10 B 2 D 5
  2.  8 B 3 A 10 C 2 D 5
  3. 8 C 3 B 10 A 2 D 5
  4. 8 B 3 C 10 A 2 D 5

Answer (Detailed Solution Below)

Option 4 : 8 B 3 C 10 A 2 D 5
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<p></p><p><b>Given:</b></p><p>‘A’ stands for ‘×’</p><p>‘B’ stands for ‘−’</p><p>‘C’ stands for ‘+’</p><p>‘D’ stands for ‘÷’</p><p>We need to find which of the following e×pressions results in 9.</p><p><b>1) 8 A 3 C 10 B 2 D 5</b></p><p>Replacing the letters with their respective mathematical operations:</p><p>8 × 3 + 10 − 2 ÷ 5</p><p>Applying the order of operations (PEMDAS/BODMAS):</p><p>= 8 × 3 + 10 − 0.4</p><p>= 24 + 10 − 0.4</p><p>= 34 − 0.4</p><p>= 33.6 ≠ 9 (Incorrect)</p><p><b>2) 8 B 3 A 10 C 2 D 5</b></p><p>Replacing the letters with their respective mathematical operations:</p><p>8 − 3 × 10 + 2 ÷ 5</p><p>Applying the order of operations (PEMDAS/BODMAS):</p><p>= 8 − 3 × 10 + 0.4</p><p>= 8 − 30 + 0.4</p><p>= −22 + 0.4</p><p>= −21.6 ≠ 9 (Incorrect)</p><p><b>3) 8 C 3 B 10 A 2 D 5</b></p><p>Replacing the letters with their respective mathematical operations:</p><p>8 + 3 − 10 × 2 ÷ 5</p><p>Applying the order of operations (PEMDAS/BODMAS):</p><p>= 8 + 3 − (10 × 2) ÷ 5</p><p>= 8 + 3 − 20 ÷ 5</p><p>= 8 + 3 − 4</p><p>= 11 − 4</p><p>= 7 ≠ 9 (Incorrect)</p><p><b>4) 8 B 3 C 10 A 2 D 5</b></p><p>Replacing the letters with their respective mathematical operations:</p><p>8 − 3 + 10 × 2 ÷ 5</p><p>Applying the order of operations (PEMDAS/BODMAS):</p><p>= 8 − 3 + (10 × 2) ÷ 5</p><p>= 8 − 3 + 20 ÷ 5</p><p>= 8 − 3 + 4</p><p>= 5 + 4</p><p><strong>= 9 (Correct)</strong></p><p>Hence, the correct answer is <b>"Option 4"</b>.</p> - guacandrollcantina.com
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