Number English French
1 one un
2 two deux
3 three trois
4 four quatre
5 five cinq
6 six six
7 seven sept
8 eight huit
9 nine neuf
10 ten dix
11 eleven onze
12 twelve douze
13 thirteen treize
14 fourteen quatorze
15 fifteen quinze
16 sixteen seize
17 seventeen dix-sept
18 eighteen dix-huit
19 nineteen dix-neuf
20 twenty vingt
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The square numbers between 1 and 20 are 1,4,9 and 16.
101
1000001
All whole numbers between 1 and 400 (=20 square).
The numbers are: 1 and 20