1 one boy
2 two boys
3 three
4 four
5 five
6 six
7 seven
8 eight
9 nine
10 ten
11 eleven
12 twelve
13 thirteen
14 fourteen
15 fifteen
16 sixteen
17 seventeen
18 eighteen
19 nineteen
20 twenty
30 thirty
40 forty
50 fifty
61 sixty-one
72 seventy-two
99 ninety-nine

1st the first boy
2nd the second boy
3rd third
4th fourth
5th fifth
6th sixth
7th seventh
8th eighth
9th ninth
10th tenth
12th twelfth
20th twentieth
22nd twenty-second
31st thirty-first


In larger numbers, we put commas (not periods) after thousands and millions. We also say and after hundreds (nowhere else).

100 a hundred/ one hundred
201 two hundred and one
666 six hundred and sixty-six
1,000 a thousand/ one thousand
222,000 two hundred and twenty-two thousand
1,000,000 a million/ one million
426,000,000 four hundred and twenty-six million
2,254,002 two million, two hundred and fifty-four thousand and two


For the number 0, we say:

zero in counting and arithmetic
zero for the temperature
'o' in phone numbers etc.
nil for the score in most sports



1/2 a half
1/3 a third
1/4 a quarter
1/5 a fifth
2 1/2 two and a half
2 3/4 two and three quarters


0.5 zero point five
0.33 zero point three three
0.25 zero point two five
0.2 zero point two
2.5 two point five
2.75 two point seven five


Whole numbers have no plural. We say two hundred (NOT hundreds). But when we are talking generally, we can say: hundreds of people


Numbers go before adjectives: Three large cars were coming along.

but after
a, an, the, this, that, these, those, - the first car
some, any, all, every, either, neither - all three cars

We can also use numbers before of: two of the cars/ two of them

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