Question 12
Wheels $A$ and $C$ each contain $\{ - 4 , - 3 , - 2 , - 1 , 1 , 2 , 3 , 4 \}$; wheel $B$ contains−,+, $\times$, $\div$, as shown. Spin $A , B , C$ and apply the selected operation; for example $4 \times 2 = 8$. How many spin outcomes produce a positive integer?
