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2020 Canada National Olympiad
Problems
(1)
2020 Canadian MO P3.
Source:
3/14/2020
There are finite many coins in David’s purse. The values of these coins are pair wisely distinct positive integers. Is that possible to make such a purse, such that David has exactly
2020
2020
2020
different ways to select the coins in his purse and the sum of these selected coins is
2020
2020
2020
?
combinatorics
Canada