var f,g:text;
a,b,k,i,n,r:int64;
begin
assign(f,'euclid2.in'); reset(f);
assign(g,'euclid2.out'); rewrite(g);
read(f,n);
for i:=1 to n do
begin
read(f,a,b);
while(0<b)do
begin
r:=a mod b;
a:=b;
b:=r;
end;
writeln(g,a);
end;
close(f);
close(g);
end.