1-20 Numbers

1 - One
2 - Two
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

Examples:

• Only twelve amphitheaters have been found in the UK.
• To be eligible, one must be at least thirteen years old.
• The service runs approximately every fifteen minutes.

1-20 exercise