Can Time Save You?

Logic Level 1

If the following is true, what would be the value of $4\star 9$ ?

$7\star7=2 \\ 8\star8=4 \\ 8\star5=1 \\ 6\star9=3 \\ 10\star11=9$

Hint: See your clock/watch.

8 6 7 4 2 1 5 3