When a number sign [Lexicon - 3.10.1.] indicates the number of entities that are referred to, that number sign is called a cardinal numeral [Lexicon - 3.10.1.1.]. An example of a cardinal numeral, two, is provided below.
[poss(d)1 daughter two] be_located_at
'My two daughters are here.'
When a number sign indicates the order of a referent in a sequence, that number sign is called an ordinal numeral [Lexicon - 3.10.1.1.]. Ordinal numbers are expressed with buoy signs.
(h1) two book there_is ix3a book yellow
(h2) two
'There are two books. The first one is yellow.'
A plural sign can be reduplicated [Phonology - 3.3.1.] when used with a numeral.
three house+++
'three houses'