(1) If you want to go to A, you must also go to B.
(2) Go to one of B and C at most.
(3) Go to at least one of D and E.
(4) whether C and D are going or not.
If you go to E, you must go to A and D..
So where did the delegation go?
There are four people living in a four-story building. They live in different buildings and their occupations are workers, teachers, doctors and drivers. Known:
(1) A lives on a higher floor than B and lower than C.
Ding lives on the fourth floor.
(3) Doctors live above the teachers and below the workers.
(4) The driver lives on the first floor.
Excuse me, what are the occupations of A, B, C and D, and what floor do they live on?
3. Miss Li, Miss Wang and Miss Zhang teach two of the six courses: Chinese, Mathematics, Society, Nature, Music and Painting. As we all know:
(1) The social teacher and the math teacher are good friends.
Teacher Wang is the youngest.
(3) Science teachers are older than Chinese teachers.
(4) Miss Li often tells science teachers and math teachers about world events.
Music teacher Wang and Chinese teacher often play chess together.
Please analyze which two courses are taught by three teachers.
A school has dance teams, folk bands and choirs. As we all know:
(1) A didn't join the folk band.
(2) C did not join the chorus.
(3) Everyone participates in two teams.
What teams did the three people join respectively?