1:
uses crt;
var a:integer;
begin
clrscr;
write('a='); readln(a);
if a mod 2=0 then writeln(a,' la so chan')
else writeln(a,' la so le');
readln;
end.
2:
uses crt;
var n,i,s:longint;
begin
clrscr;
write('n='); readln(n);
if n>5 then
begin
s:=1;
for i:=5 to n do
s:=s*i;
writeln(s);
end
else writeln('vui long nhap lai');
readln;
end.