Given set: 363, 489, 579

562

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471

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382

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281

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None of these

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Solution

The correct option is A 471
Number $⟹$ Sum of digits $⟹$ New sum of digits
363 $⟹$ 3 + 6 + 3 = 12 $⟹$ 1 + 2 = 3.
489 $⟹$ 4 + 8 + 9 = 21 $⟹$ 2 + 1 = 3.
579 $⟹$ 5 + 7 + 9 = 21 $⟹$ 2 + 1 = 3.
Similarly, 471 $⟹$ 4 + 7 + 1 = 12 $⟹$ 1 + 2 = 3.
Hence, option (B) is the correct answer.

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