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