Program euclid2;
var fi,fo :text;
n,i,a,b : longint;
function cmmdc(a,b:longint):longint;

begin
if a mod b = 0 then cmmdc:=b
else cmmdc:=cmmdc(b, a mod b);
end;
begin
assign(fi,'euclid2.in'); reset(fi); readln(fi,n); assign(fo,'euclid2.out'); rewrite(fo);
for i:=1 to n do begin read(fi,a,b); if a>b then writeln(fo,cmmdc(a,b)) else writeln(fo,cmmdc(b,a)); end;
close(fi); close(fo);
end.