10 Questions Calculating Time Zones – MATH Use the four operations to solve word problems involving distances and intervals of time. How many time zones is the world separated into? 12 20 24 36 How many time zones is North America separated into? 4 9 7 6 Which of the following is not a time zone in North America? Pacific Time Mountain Time Midwest Time Eastern Time … and 7 more awesome questions! Check them out by clicking “Play”.