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International Contests
IMO Longlists
1989 IMO Longlists
33
33
Part of
1989 IMO Longlists
Problems
(1)
Square numbers S1 and S2 s. t. S1 - S2 = 1989
Source:
9/18/2008
Find all square numbers
S
1
S_1
S
1
ā
and
S
2
S_2
S
2
ā
such that S_1 \minus{} S_2 \equal{} 1989.