Editing English numerals (section)

== Collective numbers ==
Collective numbers are numbers that refer to a group of a specific size. Words like "pair" and "dozen" are common in English, though most are formally derived from Greek and Latin numerals, as follows:
{| class="wikitable"
|+
!Group Size
!Latin-derived
!Colloquial
!Music
|-
|1
|monad
|
|solo
|-
|2
|dyad, duad
|pair, twin
|duo, duet
|-
|3
|triad
|trio, triplet
|trio
|-
|4
|tetrad
|
|quartet
|-
|5
|pentad
|
|quintet
|-
|6
|hexad
|half-dozen
|sextet
|-
|7
|heptad, hebdomad
|
|septet
|-
|8
|octad, ogdoad
|
|octet
|-
|9
|nonad, ennead
|
|nonet
|-
|10
|decad, decade
|
|-
|11
|hendecad
|
|-
|12
|dodecad, duodecade
|dozen
|-
|1000
|chiliad
|
|}
 
Although somewhat antiquated, English has several other collective numbers such as brace (2), score (20), and [[Gross (unit)|gross]] (144).
 
Score is perhaps the most famous of these, widely recognized in the USA due to Abraham Lincoln's historic [[Gettysburg Address]] which begins "Four score and seven years ago..."