var a,b,c,i,n:integer;
    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
    read(f,a);
    readln(f,b);
    c:=a;
    while b<>0 do
          begin
          c:=a mod b;
          a:=b;
          b:=c;
          end;
    writeln(g,a);
    end;
close(f);
close(g);
end.