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The number of digits in the smallest number which when multiplied...

This question belongs to Arithmetic Ability Number System
Number System
?

The number of digits in the smallest number, which when multiplied by 7 yields all nines, is :

Answer & Solution
Correct Answer: Option D
We keep on dividing 99999..... by 7 till we get 0 as remainder.
Number System mcq solution image
∴ Required number = 142857
Number of digit = 6
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