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Numbers whose base-10 representation has the same nonzero number of 0's and 5's.
0

%I #13 Nov 22 2024 18:07:49

%S 50,105,150,205,250,305,350,405,450,501,502,503,504,506,507,508,509,

%T 510,520,530,540,560,570,580,590,605,650,705,750,805,850,905,950,1015,

%U 1025,1035,1045,1051,1052,1053,1054,1056,1057,1058,1059,1065,1075

%N Numbers whose base-10 representation has the same nonzero number of 0's and 5's.

%t Select[Range[1250],DigitCount[#,10,0]==DigitCount[#,10,5]>0&] (* _Harvey P. Dale_, Nov 22 2024 *)

%K nonn,base,easy

%O 1,1

%A _Olivier GĂ©rard_