8. On a circular track that is 660 m long, a relay race is being held, with each stage being $150 \mathrm{~m}$. The start and finish are in the same place. What is the minimum number of stages that can be in this relay?
8. Since 660 is not divisible by 150 without a remainder, we will find the least common multiple of these numbers: $660=2^{2} \cdot 3 \cdot 5 \cdot 11, 150=2 \cdot 3 \cdot 5^{2}$, LCM $(660,150)=$ $=660 \cdot 5=3300$. Therefore, the smallest number of stages in this relay is $3300: 150=22$.