2. 11-19
The numbers from 11 to 19 are combinations of the basic numbers 1-9 and the word teist, which means 'of ten'. It is similar to the english suffix '-teen'.
3. Mutiples of Ten
The numbers 20, 30, 40, 50, etc. are constructed by adding the suffix kümmend to the numbers 1-9. It is similar to the english suffix '-ty'.