tests by arpeggia with the online test builder (153 tests)
Ranked by: number of candidates
1. Der - die - das (18589 candidates)
2. Adjective (12054 candidates)
3. Perfekt: 'haben' or 'sein'? (12004 candidates)
4. Modal verbs (11831 candidates)
5. Prepositions + dative or accusative case (10972 candidates)
6. Denn/weil (10006 candidates)
7. Comparisons: als/wie (9018 candidates)
8. Indirect questions (8522 candidates)
9. Times of the day (6184 candidates)
10. Seit/bis (5833 candidates)
11. Hätte or wäre? (5619 candidates)
12. Accusative or dative (5296 candidates)
13. Wer - wen - wem - wessen (4440 candidates)
14. Personal pronouns (4284 candidates)
15. Das und dass (4087 candidates)
16. Accusative / Dative (3972 candidates)
17. Verbs + prepositions (3395 candidates)
18. Als / Wenn (3279 candidates)
19. Demonstrative pronouns (3209 candidates)
20. Prepositions + accusative/dative (3186 candidates)