If it were possible to eat a hamburger every minute of every day (day and night) without stopping how many years would it take to eat a billion hamburgers.

Well, you would have to find how many minutes were in a year ... 525,600 mins in one year

then divide 1 billion by 525,600 = 1902.58751903

so it would take about 1902.59 years to eat 1 billion burgers (one per minute)

(i think)