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Number Theory: Interesting Results

On multiplyin...

Question

On multiplying a number by $7$ , the product is a number each of whose digits is $3$ . The smallest such number is:

A

47619

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B

47719

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C

48619

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D

47649

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Solution

The correct option is B $47619$
By hit and trial , we find that
$47619 \times = 333333$ .

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