Question

Last one how do I solve this problem

Answer 1

Every 6 because 6 goes into 6,3, and 2

Answer 2

Let ---- represent 1/6 of the course. Then the obstacles will appear as

---- {T} ---- {T,C} ---- {T,H} ---- {T,C} ---- {T} ---- {T,C,H} [end of course]

A cone will appear with every other tire.
A hurdle will appear with every third tire.