FIGURES

See also NUMBERS.

Form plural with s, no apostrophe.

In general use figures for the following:

cardinal and ordinal numbers larger than nine, ninth

ages of persons, animals, and things above nine

calibers: .50-caliber machine gun, 40-mm cannon

centuries: the 1800s

dates

decimals

Egyptian dynasties: 1st dynasty, 12th dynasty

fractions (See FRACTIONS.)

headlines: use numerals for all numbers except in casual uses: "thousands" instead of "1,000s."

lens apertures: f/16

latitude and longitude: 72° 54' 23" N, 165° 53' W

page numbers

percentages; but one percent

sessions of Congress above the Ninth

sums of money that are not whole units or that are above units of nine:

            $1.21, $11 (not $11.00); but eight dollars. (See MONEY.)

temperatures

times of day with a.m. and p.m.

Use Roman numerals for rulers, popes, Olympiads, personal names, ships, and a few other special uses. For formation, see Number Table in Webster's.

Olympics: XIII Olympiad