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