So far we have learned cardinal numbers (one, two), ordinal numbers (first, second), fractional numbers (half, third).
Croatian has more numbers. There's a set of universal numbers, also known as collective numbers.
Recall that Croatian numbers 2-4 (dva/dvije, etc.) can be used only with genitive singular. Therefore they cannot be used with e.g. noun ljudi m pl. people. Also, numbers larger than 4 (pet, šest, etc.) can be used with nouns genitive plural only. That caused problems for nouns like djeca (coll.) children since they are actually in singular! There was no way to count less than 5 people or more than 4 children.
Luckily, this set of numbers has no restriction and can count any number of people and children. Each number has two forms – an adverb and a noun. They are listed here:
The pattern for larger numbers is: take an ordinal adjective (e.g. osm-i), remove the final -i and add either -ero or -orica.
You will sometimes hear versions of adverbs with -oro (e.g. četvoro). They are very common in Bosnia and Serbia, and heard in Croatia as well.
How to use the words we have just learned? First, the adverbs are used to count nouns ljudi, djeca and braća:
Imam petero djece. I have five children.
Razgovarao sam s troje ljudi. I talked to three people.
Despite being universal, the collective adverbs are kind of secondary: if you can use the normal numbers (as with most numbers) you will not use the collective adverbs! Therefore, they are mostly used to count those three nouns (ljudi, djeca and braća), but even with braća you will very often hear and read:
Imam dva brata. I have two brothers.
Collective adverbs can be used, but for some reason people prefer dva brata to dvoje braće. (Of course, for numbers greater than 4 there's no other option, but to use collective adverbs with the noun braća, since it's a mass noun.)
The collective adverbs can be used on their own, and they imply a number of people, of mixed or unknown sex. They behave as other adverbs, as if in neuter singular, but you'll sometimes see masculine plural as well:
Oboje je otišlo. Both left.
Oboje su otišli. (sometimes used)
The noun dvojica really stands for two men (or two boys — two males of any kind really). The same holds for all other nouns listed above. The nouns are mass nouns, i.e. they are in singular, despite meaning plurality, and change like any other singular nouns on -a:
Razgovarao sam s obojicom. I talked to both men. (or both boys)
Actually, the nouns obojica, dvojica, etc. behave exactly like djeca and braća: they require verbs in plural, despite being in feminine singular. Compare:
Djeca su otišla. Children left.
Obojica su otišla. Both men left.
It's very frequent, but kind of colloquial, to use dvoje and other adverbs for any groups of people, including male-only groups and female-only groups.
The collective numbers give us another possibility: you can express counted pronouns, like us two. As you probably expect, the pronoun will be in the genitive case, and the form of the number will depend on the gender, but there's one twist you probably didn't expect: pronouns come before numbers. The forms are:
|all-male||mixed||all-female||nas obojica||nas oboje||nas obje||nas dvojica||nas dvoje||nas dvije||nas trojica||nas troje||nas tri||etc.|
You get the system: for all-male groups, the specific mass nouns listed above are used; for all-female groups, regular (cardinal) numbers in the feminine gender; for mixed groups, the mass adverbs listed above. Colloquially, the mixed sex pattern is very often used even for all-male and all-female groups.
The constructs above can mean either e.g. us two or two of us. However, there's a variation, if two of us stands for two out of a larger group of us (e.g. there are five of us in total, and two of us should do something...). In such a case you can use either:
dvoje nas two of us, out of a larger group
dvoje od nas (the same, but a bit more precise)
Of course, instead of nas, you can use vas or njih (stressed forms must be used) to get various expressions:
njih trojica three of them (all male)
vas obje both of you (all female)