10 11-20 21-30 31-40 41-50 1-10 11-20 21-30 31-40 41-5...

Câu 1-10 11-20 21-30 31-40 41-50 1-10 11-20 21-30 31-40 41-50 1 C C B A D C A A A D 2 D B D A A D A B D A 3 B C A D A C D C D D 4 A A B A D A C B D D 5 D C D B C C A D A B 6 D D B A D B D D D A 7 C B C B B D D D A D 8 C C A B D A A B D B 9 A A C C B C C C B D 10 C D B A B D C C D D 123 124