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(365) 4

Part of 1993 Tournament Of Towns

Problems(1)

TOT 365 1993 Spring A J4 25 students in Peter’s class

Source:

6/10/2024
There are 2525 students in Peter’s class (not counting him). Peter has observed that all 2525 have different numbers of friends in this class. How many friends does Peter have in this class? (Give all possible answers.)
(S Toparev)
combinatorics