if [ -r * ] then or if [ -w * ] then
those commands are not working

example
kganeshb@its04489:~/scripts $ ls -l
total 340
-rw-r----- 1 kganeshb users 9038 Oct 22 13:23 109_db.t
-rw-rw---- 1 dlc users 1413 Oct 10 17:40 1.txt
-rw-rw---- 1 kganeshb users 45 Jan 28 13:46 a
-rw------- 1 kganeshb users 197 Dec 26 13:19 aa
-rw-rw---- 1 kganeshb users 99 Jan 28 13:37 aaa
-rw-rw---- 1 kganeshb users 110 Jan 28 12:29 aaa.sh
-rw-r--r-- 1 kganeshb users 11146 Sep 29 15:36 aat.txt
-rw-rw---- 1 kganeshb users 58 Dec 29 19:03 aa.txt
-rw-rw---- 1 kganeshb users 639 Jan 8 11:48 add.sh

Script:
if [ -r * ]
then
echo "readable"
else
echo "not"
fi

Output:
bash: [: too many arguments
not

Note: Currently we are using the Suse 2.0 Version.