ĐỀ 1

A 1, 8, 15, 19

B 2, 5, 9, 11, 13, 16, 18

C 3, 7, 20

D 4, 6, 10, 12, 14, 17

ĐỀ 2

A 2, 8, 9, 15, 19

B 6, 7, 10, 12, 16, 20

C 5, 11, 17

D 1, 3, 4, 13, 14, 18

ĐỀ 3

A 7, 8, 12, 13, 17, 20

B 3, 4, 5, 9, 15, 16

C 6, 11, 14, 19

D 1, 2, 10, 18

ĐÊ 4

A 5, 9, 12, 13, 15, 18

B 14

C 1, 6, 8, 11, 17, 19, 20

D 2, 3, 4, 7, 10, 16

ĐỀ 5

A 3, 6, 9, 13, 14, 18, 19, 20

B 2, 21

C 1, 4, 5, 7, 10

D 8, 11, 12, 15, 16, 17