var f,g:text;
n,i,a,b,r:longint;
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
          r:=a mod b;
          a:=b;
          b:=r;
    end;
    writeln(g,a);
end;
close(f);
close(g);
end.