program eculid2;
var a,t,i,b,n:longint; f,g:text;
begin
   assign(f,'euclid2.in'); reset(f);
   assign(g,'euclid2.out'); rewrite(g);
   readln(f,n);
   for i:=1 to n do begin

       readln(f,a,b);
       while (b<>0) do begin
           t:=b;
           b:=a mod b;
           a:=t;
       end;
       writeln(g,a);
  end;
  close(f); close(g);
end.