tests by arpeggia with the online test builder (153 tests)
Ranked by: number of candidates
1. Der - die - das (18462 candidates)
2. Perfekt: 'haben' or 'sein'? (11881 candidates)
3. Adjective (11880 candidates)
4. Modal verbs (11745 candidates)
5. Prepositions + dative or accusative case (10831 candidates)
6. Denn/weil (9860 candidates)
7. Comparisons: als/wie (8957 candidates)
8. Indirect questions (8255 candidates)
9. Times of the day (6143 candidates)
10. Seit/bis (5801 candidates)
11. Hätte or wäre? (5590 candidates)
12. Accusative or dative (5280 candidates)
13. Wer - wen - wem - wessen (4362 candidates)
14. Personal pronouns (4277 candidates)
15. Das und dass (4039 candidates)
16. Accusative / Dative (3946 candidates)
17. Verbs + prepositions (3346 candidates)
18. Als / Wenn (3267 candidates)
19. Demonstrative pronouns (3198 candidates)
20. Prepositions + accusative/dative (3161 candidates)