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OpenStudy (anonymous):
the first 8 positive integer powers of 3 are shown below. what iis the units digit for 3^215? 3^1=3 3^2=9 3^3=27 3^4=81 3^5=243 3^6=729 3^7=2187 3^8=6561
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OpenStudy (experimentx):
factorize 215 and find out
OpenStudy (anonymous):
look at the units digit of your examples... there's a pattern. then do what @experimentX says to find your answer..
OpenStudy (experimentx):
i don't think you will get it there because 215 is 5x43, and 43 is not there, and it's prime
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