var a,b,r:longint;
t,i:1..100000;
f,g:text;
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 b=0;
 writeln(g,a);
end;
close(f);
close(g);
end.