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Mathematics 7 Online
OpenStudy (anonymous):

How many of the 343 smallest positive integers written in base 7 use 4 or 5 (or both) as a digit?

OpenStudy (dayakar):

343 is divisible by only 7 343 = 7* 7 *7

OpenStudy (dayakar):

= 7^3

ganeshie8 (ganeshie8):

^ start by converting 343 from base 10 to base 7

OpenStudy (anonymous):

thanks

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