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Two positive integers each have a units digit of 2 when expressed in base 5. Find the units digit of their product when expressed in base 5. 

 Dec 10, 2020
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The  base  10 representation of these  numbers =  a(5)n  + b(5)n -1  +  c(5)n-2  +  . .. +  ...2

 

The units digit of their product   = 4  when expressed in base 5

 

cool cool cool

 Dec 10, 2020

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