14 votes

Relatively prime numbers

tehtmi's user avatar
  • 2,976
3 votes

First digit of 3^2020

I think it is a $6$ due to some mathematical reasons. Consider logs base 10. $log(3)$ is $0.477121254...$,and this number times $2020$ is $963.7849345...$ We can ignore the first three digits which ...
A Math guy's user avatar

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