I spell them correctly.
These are the prime numbers 1-20 2,3,5,7,11,13,17,19
The numbers 1-20 are on a dart board so there are twenty numbers.
20 and 1. 20 + 1 = 21 20 - 1 = 19
2/5 of the numbers from 1 to 20 are prime numbers
12
one
English
One to twenty
The square numbers between 1 and 20 are 1,4,9 and 16.
10,000,000,000,000 I think
Uno-cincuenta