A hospital needs 150 pills to treat 6 patients for a week. How many pills does it need to treat 10 patients for a week?

--The hospital needs 150 pills to treat 6 patients in a week.

-- So it needs (150/6)=25 pills to treat one person per week.

---For 10 patients to treat per week, the hospital will need (25x10)=250 pills per week.