Narayanganj Higher Secondary 2014 P9

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samiul_samin
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Joined: Sat Dec 09, 2017 1:32 pm

Narayanganj Higher Secondary 2014 P9

Unread post by samiul_samin » Mon Feb 18, 2019 7:58 pm

At least how many numbers are needed to be taken to be sure that there are at least $11$ numbers among these numbers where the difference between any two is divisible by $7$?

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