363 : 489 : 579 : ?

562

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471

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382

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281

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Solution

The correct option is D 471
$3 + 6 + 3 = 12$ , sum of the digits $= 1 + 2 = 3$
$4 + 8 + 9 = 21$ , sum of the digits $= 2 + 1 = 3$
$5 + 7 + 9 = 21$ , sum of the digits $= 2 + 1 = 3$
$\Rightarrow 471 = 4 + 7 + 1 = 12$ , sum of the digits $= 1 + 2 = 3$ .

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