tests by arpeggia with the online test builder (153 tests)
Ranked by: number of candidates
1. Der - die - das (18522 candidates)
2. Adjective (11970 candidates)
3. Perfekt: 'haben' or 'sein'? (11919 candidates)
4. Modal verbs (11776 candidates)
5. Prepositions + dative or accusative case (10908 candidates)
6. Denn/weil (9935 candidates)
7. Comparisons: als/wie (8994 candidates)
8. Indirect questions (8389 candidates)
9. Times of the day (6167 candidates)
10. Seit/bis (5823 candidates)
11. Hätte or wäre? (5609 candidates)
12. Accusative or dative (5290 candidates)
13. Wer - wen - wem - wessen (4405 candidates)
14. Personal pronouns (4282 candidates)
15. Das und dass (4066 candidates)
16. Accusative / Dative (3958 candidates)
17. Verbs + prepositions (3373 candidates)
18. Als / Wenn (3270 candidates)
19. Demonstrative pronouns (3205 candidates)
20. Prepositions + accusative/dative (3178 candidates)