What part of speech is the word eight in?
The number eight can be a numeric or a word. It is a word for many things: age, hour, power, season, section, kind, etc. Eight is the largest number that can be divided by two without remainder and is thus called a perfect number. These are very rare - only five numbers other than eight are perfect: 2, 4, 6, 10, and 12. As a word, eight has several meanings depending on its context: age, hour, power, season, section, kind, etc. A group of eight people is called an octet. An octave is a span of eight notes, so eight sounds are needed to make one octave. An eigth-note period is an interval that is divisible by both 8 and 16 (see table below). An eighth note is played after each sentence in this article and is marked "*" by a punctuation mark. Eights are common in music, where it is usual to refer to an interval as being an octave, minor third, or major sixth. Eights also appear frequently in mathematics, especially when counting methods are involved.