tests by jagienka with the online test builder
(8 tests)
Ranked by: number of candidates
1. Declension : Definite articles (dative/accusative) (73082 candidates) 
2. Conjunctions : dass, deshalb, weil, denn (69062 candidates)
3. Negation (nicht / kein) (21221 candidates)
4. Subjunctive II (10594 candidates)
5. Perfekt (3284 candidates)
6. Additions from 0 to 10 (3232 candidates)
7. Declension : Epithet adjectives (2430 candidates)
8. Plural- nouns ending with -er (1967 candidates)
(8 tests) Ranked by: number of candidates
1.
Declension : Definite articles (dative/accusative) (73082 candidates) 2.
Conjunctions : dass, deshalb, weil, denn (69062 candidates) 3.
Negation (nicht / kein) (21221 candidates) 4.
Subjunctive II (10594 candidates) 5.
Perfekt (3284 candidates) 6.
Additions from 0 to 10 (3232 candidates) 7.
Declension : Epithet adjectives (2430 candidates) 8.
Plural- nouns ending with -er (1967 candidates) 