Which among the following is different from others?

222, 231, 402, 505 

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DFCCIL Executive CBT1 Electrical 25 Aug 2023 Shift 2 Official Paper
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  1. 222 
  2. 231 
  3. 402 
  4. 505

Answer (Detailed Solution Below)

Option 4 : 505
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Detailed Solution

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Logic followed here is:

Logic: Digital sum is "6".

Option 1) 222: The sum of digits is 2 + 2 + 2 = 6.

Option 2) 231: The sum of digits is 2 + 3 + 1 = 6.

Option 3) 402: The sum of digits is 4 + 0 + 2 = 6.

Option 4) 505: The sum of digits is 5 + 0 + 5 = 10.

Hence, the correct answer is "Option 4".

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