Therefore, 3 in words is written as Three.
A simple rule for using numbers in writing is that small numbers ranging from one to ten (or one to nine, depending on the style guide) should generally be spelled out. Larger numbers (i.e., above ten) are written as numerals.
Spell out numbers zero through one hundred.
Use numeral figures to represent numbers above one hundred, but spell out whole numbers like three hundred or one thousand. Use numerals to represent non-whole numbers, such as 1,239 or 603.
The reason is, simply, preference and writing style. If you can write one of these faster by hand, you'll use that more naturally because it's quicker. You may also train yourself to write a certain way, if you do really prefer one over another, but so long as it's readable it's fine to use any.
AP Stylebook Numbers Rules
Spell out numbers nine and below; use numerals for numbers above 10. Avoid starting sentences with numbers; most can be spelled out, but years must appear as numerals, so try to write the sentence a different way.
The rule of three is a writing principle that suggests that a trio of entities such as events or characters is more humorous, satisfying, or effective than other numbers.
When writing ordinal numbers such as 1st, 2nd, 3rd, etc. you should use the last two letters on the word as it would be if you wrote out the whole word. Below are the ordinal numbers both written out and with digits for 1-20. As you can see, 1st, 2nd, and 3rd use -st, -nd, and -rd, but 4th-20th use -th.
The digit '3' can be written in 3 ways as follows : 3 = 2 + 1 = 1 + 1 + 1 (order of addition of numbers is not important) According to the above, in how many ways 5 can be written using digits less than or equal to 5 ?
Here, the numerator is 3 and the denominator is 7. So, here numerator is less than the denominator. Simply we write 3 in numerator and 7 in the denominator as a result 3 divided by 7 can be written as (3/7) in fraction form. Thus, 3 divided by 7 as a fraction can be written as (3/7).
Numbers up to and including ten should be spelled out in full. Numbers after and including 11 should be written using numerals. Very large numbers should be written by combining a figure and a word such as million or billion. Fractions should generally be written in full and hyphenated in prose.
In the United States, we use the decimal or period (“.”) to represent the difference between whole numbers and partial numbers. We use the comma (“,”) to separate groups of three places on the whole numbers side.
Etymology of two
The word two is derived from the Old English words twā (feminine), tū (neuter), and twēġen (masculine, which survives today in the form twain).
The fraction (mathematics) three quarters (3⁄4) equal to 0.75.
The 3/4 time signature is sometimes called waltz time.