var n,i,a,b,r:longint;
f,g:text;
begin
assign(f,'euclid2.in');
assign(g,'euclid2.out');
reset(f);
rewrite(g);
readln(f,n);
for i:=1 to n do begin
                 readln(f,a,b);
                 repeat
                 r:=a mod b;
                 a:=b;
                 b:=r;
                 until r=0;
                 writeln(g,a);
                 end;
close(f);
close(g);
end.