multi-party
it is not federalism as federalism only has 43 of 123 nations
multi-party
base-10 number system
Arabic
No, they are not.
no because its not common in the world today.
The two most common party systems in English-speaking countries are the two-party system, where two major parties dominate the political landscape (e.g., Democrats and Republicans in the U.S., Conservatives and Labour in the UK), and the multi-party system, where several parties compete for power and representation (e.g., Canada, Australia).
The most common number system used today is the Hindu-Arabic numeral system, which comprises the digits 0 through 9. This system is widely utilized in mathematics, commerce, and everyday counting due to its simplicity and efficiency, particularly the place-value concept. It has largely replaced other numeral systems, such as Roman numerals, in most regions around the world.
Zero
not at all not in the world since 1940!
very very bad system of the world
unitary system