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IMO Shortlist 1990 problem 23
1990
IMO
shortlist
tb
Determine all integers
such that
is an integer.
%V0 Determine all integers $n > 1$ such that $$\frac {2^n + 1}{n^2}$$ is an integer.
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Težina
1438
IMO Shortlist 1972 problem 8
1972
IMO
shortlist
tb
1
1508
IMO Shortlist 1977 problem 10
1977
IMO
shortlist
tb
0
1569
IMO Shortlist 1981 problem 12
1981
IMO
shortlist
tb
2
1614
IMO Shortlist 1983 problem 18
1983
IMO
shortlist
tb
0
1644
IMO Shortlist 1985 problem 3
1985
IMO
shortlist
tb
0
1699
IMO Shortlist 1987 problem 15
1987
IMO
shortlist
tb
0