For the math i don't get number 4. Do we have to find all three of the numbers common mutiples or can it just be two of them?
You need to find all three. You may need to go and count farther into the times table. They may be a big number..
For the novel, what if the rule didn't apply for our life?
It doesnt have to be a clinic hallway. What about a regular hallway or why people shouldnt run in certain places.