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Quantitative Aptitude

Fermat Theorem

When 10 x is ...

Question

When $10^{x}$ is divided by 13, remainder is 1. If x is a natural number less than 100, how many values can x take?

A

8

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B

16

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C

1

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D

12

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Solution

The correct option is B 16
Option B is the correct answer. Check the video for the approach.

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