This kind of question may seem dizzying, but it is actually very simple. I have a special effect method, the list method. Using this method, you will definitely be able to quickly master this type of question.
------Biology----Physics----English----Physical Education----History----Mathematics
李
Zhao
Cui
OK, the list is done, let’s analyze it below:
From 3, we can see that Cui is definitely not a biology teacher or a physical education teacher , therefore
——-Biology-Physics-English-Physical Education-History-Mathematics
Li
Zhao
< p>Cui——-×——————————--×It can be seen from 5 that Li is not an English teacher or a mathematics teacher, so
— ——-Biology——Physics——English——Physical Education——History——Mathematics
Li——————————-×——————————- -×
Zhao
Cui——-×——————————--×
From 2 and 4, Li is the smallest , and the biology teacher is older than the math teacher, that is, biology is not the smallest, so biology is not Li, so
——--Biology-Physics-English-Physical Education-History-Mathematics
p>
Li——-×——————--×——————————--×
Zhao
Cui—— -×——————————--×
It can be seen from this table that since neither Li nor Cui is a biology teacher, then Zhao must be, therefore
——--Biology-Physics-English-Physical Education-History-Mathematics
Li——-×——————-×———————— ——--×
Zhao——-√
Cui——-×————————--×
By 3 The person who teaches biology and the person who teaches physical education are not the same person. From 4, the person who knows biology and teaches mathematics is not the same person, and Zhao teaches biology. Therefore, Zhao does not teach physical education and mathematics.
This means that It can be seen that since neither Li nor Cui is a biology teacher, then Zhao must be, therefore
Biophysics English Physical Education History Mathematics
Li × ??× ×
Zhao √ × ×
Cui × , therefore
Biophysics English Physical Education History Mathematics
Li × ??× √ ×
Zhao√ × ×
Cui × × √< /p>
From 1 we also know that those who teach physical education do not teach physics, but Li teaches physical education, so Li does not teach physics, therefore
Biophysics English Physical Education History Mathematics
Li × × × √ ×
Zhao√ × ×
Cui × The subject can only be history, so
From 1 we also know that those who teach physical education do not teach physics, but Li teaches physical education, so Li does not teach physics, so
Biophysics English Physical Education Historical Mathematics
Li × ??× × √ √ ×
Zhao√ × ×
Cui × × √
As can be seen from the table, since Li teaches history, but Zhao and Cui must not teach history, so
Biophysics English Physical Education History Mathematics
Li × ??× × √ √ ×
Zhao √ × × ×
Cui× × It can be seen that since Li teaches history, Zhao and Cui must not teach history, therefore
Biophysics English Physical Education History Mathematics
Li × ??× × √ √ ×
Zhao√ × × ×
Cui × × × × √
Since neither Li nor Cui teaches English, Zhao must teach English, therefore
Biology Physics English Physical Education History Mathematics
Li × ??× × √ √ ×
Zhao√ √ × × ×
Cui × × × × √
< p>Because Zhao already teaches biology and English, Zhao does not teach physics, so Cui teaches physics, soBiophysics English Physical Education History Mathematics
Li × ??× × √ √ ×
Zhao√ × √ × × teachers and history teachers, Zhao is a biology teacher and an English teacher, and Cui is a physics teacher and a math teacher.
Using this method is simple and clear, very intuitive, and less error-prone. It is recommended to use it. However, in actual use, you don't have to draw so many tables (I draw them like this to make it easier for you to see). Just one is enough. (It’s so tiring to draw tables. Due to Baidu’s poor web page editing function, the tables I drew are not easy to read. Thank you for your hard work, hehe)