Numbers

Whole Numbers also known as Cardinal Numbers - used for counting

Symbol	Word
0	Nought/Zero
1	One
2	Two
3	Three
4	Four
5	Five
6	Six
7	Seven
8	Eight
9	Nine
10	Ten

More numbers

11	Eleven
12	Twelve
13	Thirteen
14	Fourteen
15	Fifteen
16	Sixteen
17	Seventeen
18	Eighteen
19	Nineteen
20	Twenty
21	Twenty-one
30	Thirty
40	Forty
50	Fifty
60	Sixty
70	Seventy
80	Eighty
90	Ninety
100	One hundred
101	One hundred and one
1,000	One thousand
1,000,000	One million
1,000,000,000,000	One billion

Ordinal Numbers - used for ranking

In figures	In words
1st	the first
2nd	the second
3rd	the third
4th	the fourth
5th	the fifth
6th	the sixth
7th	the seventh
8th	the eighth
9th	the ninth
10th	the tenth
11th	the eleventh
12th	the twelfth
13th	the thirteenth
14th	the fourteenth
15th	the fifteenth
16th	the sixteenth
17th	the seventeenth
18th	the eighteenth
19th	the nineteenth
20th	the twentieth
21st	the twenty-first
22nd	the twenty-second
23rd	the twenty-third
24th	the twenty-fourth
25th	the twenty-fifth
26th	the twenty-sixth
27th	the twenty-seventh
28th	the twenty-eighth
29th	the twenty-ninth
30th	the thirtieth
40th	the fortieth
50th	the fiftieth
60th	the sixtieth
70th	the seventieth
80th	the eightieth
90th	the ninetieth
100th	the hundredth
101st	the hundred and first
1000th	the thousandth

Letters as Numbers

~ k ~

The letter k is often used to denote a thousand. So, 1k = 1,000. If you see a job advertised and it offers a salary of £12k it means £12,000.00.

~ m ~

The letter m is often used to denote a million. So, 1m = 1,000,000. If you see a job advertised and it offers a salary of £12m, apply for it!

~ bn ~

The letters bn denote a billion. So, 1bn is usually 1,000,000,000 (see above). If you see a job advertised and it offers a salary of £12bn, it's probably a missprint.

myriad

The word myriad used to mean 10,000. Nowadays it's used to refer to a countless number or multitude of specified things. For example: Earth hosts a myriad of animals.

Expressing the year

How we write the year	2008	1900	1959	2000
How we say the year	Two thousand and eight	Nineteen hundred	Nineteen fifty-nine	The year 2000

Expressing the date

How we write the date	1st January 2004	07/09/1959	August 12 2003
How we say the date	The first of January 2004	The seventh of September 1959	August the 12th 2003

Prepositions

For single days and dates we use on.

For example:

I was born on the 7th of the month.

For months we use in.

For example:

I was born in September.

My birthday is on September the 7th.

Naturally speaking

How to ask the day or date

• What day is it please? It's Tuesday.
• What date is it please? It's the 1st of April.
• What's the date today please? It's the 1st of April.

Interesting Stuff

AD stands for Anno Domini (Latin for "In the year of (Our) Lord"), abbreviated as AD. It defines an epoch based on the traditionally-reckoned year of the conception or birth of Jesus of Nazareth. it is used in the English language to denote years after the start of this time.

BC stands for Before Christ (from the Ancient Greek "Christos" or "Anointed One", referring to Jesus), abbreviated as BC, it is used in the English language to denote years before the start of this time.

Some non-Christians also use the abbreviations AD and BC without intending to acknowledge the Christian connotation, but some people prefer the alternatives 'CE' (Common Era) and 'BCE' (Before Common Era), arguing that they are more neutral terms.

A millennium (pl. millennia) is a period of one thousand years.

A century is a period of one hundred consecutive years. Centuries are numbered ordinally (e.g. "the nineteenth century").

A decade is a period of 10 years.

The decades from 1920 to 1999, are called "the Twenties", "the Sixties", etc. But the current decade has no universally accepted name. Some refer to the decade as the "twenty hundreds" while others may refer to it as the "two thousands". In written form, this could appear as "the '00s" or "the 2000s". But writing "the 2000s" or simply saying "the two-thousands" can cause confusion, since this could refer to the entire 21st century or even the entire millennium.

Some people tried to popularize "the Noughties" as the decade's name. This is a play on words, nought means "zero" and noughties sounds both like nineties and naughty.

Note - When writing the date as numbers British and American English differ. To write the date 7th of September 2007 a Brit would write dd/mm/yy (07/09/07) and an American would write mm/dd/yy (09/07/07). This often causes great confusion. It's better to write the date in full (7th September 2007 or September 7th 2007). It also looks nicer.