In Europe you will be given arithmetic problems involving whole numbers. You will add, subtract, multiply, and divide whole numbers. The locations you will visit are: Germany, United Kingdom, France, Italy, Spain, Poland, Ukraine, Romania, The Netherlands, Belgium, Czech Republic, Greece, Portugal, Sweden en Hum (in Croatia). (Hum (in Croatia) is the smallest city in Europe and in the world.)
In Africa you will be given arithmetic problems involving decimal numbers. You will add, subtract, multiply, and divide decimal numbers.
In Asia you will be given arithmetic problems in which you will again calculate with whole numbers, but now also with negative numbers. You will add, subtract, multiply, and divide with whole negative numbers.
In Oceania you will be given math problems involving fractions. You will add, subtract, multiply, and divide fractions.
In North America you will be given arithmetic problems in which you will again calculate with decimal numbers, but now also with negative decimal numbers. You will add, subtract, multiply, and divide with negative decimal numbers.
In South America you will be given arithmetic problems in which you will again calculate with fractions, but now also with negative fractions. You will add, subtract, multiply, and divide with negative fractions.
In each country, you work your way through different cities. After completing a number of cities, you get a bonus level where you can earn coins. With these coins, you can immediately restart certain cities if you don't complete them.
Finishing the final bonus level will earn you DUBs in addition to coins. A DUB gives you extra time during ‘the 100’, with multiple DUBs giving you even more extra time. A DUB remains valid for 30 days, but can always be re-earned (or extended).
After earning a DUB, you gain access to play “the 100” for that country. You are given 100 sums to answer in 10 seconds. Although this is impossible, you are given tools to help you solve as many sums as possible. For example, you get extra time for every DUB you have earned.
To ensure a fun competition, there are rankings. These rankings are available per country, continent, and worldwide. The rankings are based on the times from the last 30 days. The rankings are updated every minute.
After you have completed a country, you will have the opportunity to practice all cities. You select which city you want to practice and can start right away. This allows you to practice the cities you find most difficult. Another advantage is that your times are saved.