program euclid2;
var a,b,i,cmmdc:integer;
    t: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
read(f,a,b);
if (a=0) or (b=0) then cmmdc:=1 else
begin
while a<>b do begin
if a>b then a:=a-b else b:=b-a;
end;
cmmdc:=a;
end;
writeln(g,cmmdc);
end;
close(f);
close(g);
end.