isabelle/valid/amc12a_2008_p15.thy (12 lines of code) (raw):
(*
Authors: Albert Qiaochu Jiang
*)
theory amc12a_2008_p15 imports
Complex_Main
begin
theorem amc12a_2008_p15:
fixes k :: nat
assumes h0 : "k = 2008^2 + 2^2008"
shows "(k^2 + 2^k) mod 10 = 6"
sorry
end