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Mathematics 18 Online
OpenStudy (anonymous):

How many positive, four-digit numbers have 7 as their second digit and 8 as their last digit?

OpenStudy (anonymous):

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OpenStudy (anonymous):

so, 9*10

OpenStudy (anonymous):

90 ?

OpenStudy (anonymous):

thanks @sauravshakya !

OpenStudy (anonymous):

Yes 90 Welcome

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