var f,g:text;
    t:1..100000;
    i,a,b,r:longint;
begin
assign(f,'euclid2.in'); reset(f);
assign(g,'euclid2.out'); rewrite(g);
readln(f,t);
for i:=1 to t 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.