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Mathematics 7 Online
OpenStudy (anonymous):

what is the 2nd perfect number?

OpenStudy (vishal_kothari):

28

OpenStudy (anonymous):

yes you are right,

OpenStudy (vishal_kothari):

thanks..

OpenStudy (vishal_kothari):

you have a nice name...

OpenStudy (anonymous):

thanks..

OpenStudy (anonymous):

28

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