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On multiplying a number by 7 all the digits in the...

This question belongs to Arithmetic Ability Number System
Number System
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On multiplying a number by 7, all the digits in the product appear as 3’s. The smallest such number is :

Answer & Solution
Correct Answer: Option A
We keep on dividing 33333... by 7 till we get 0 as remainder.
Number System mcq solution image
∴ Required number = 47619
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