Combinatorics
21. 15 students join a competition. Only top 5 students can be promoted to next round. How many different way(s) of promotion advance is / are there?
Different way: Cách khác nhau.
22. It is known that there are 8 classes of grade 5 in a primary school. At least how many students are there in grade 5 to ensure there exist 41 students in the same class?
At least: Ít nhất; Ensure: Chắc chắn; Exist: Tồn tại.
23. Choose 3 digits from 1, 2, 3, 4, 6, 8 and 0 to form 3-digit numbers. How many even number(s) greater than 300 is / are there? (The repetition of digits is not allowed)
Digit: Chữ số; 3-digit number: Số có 3 chữ số; Even number: Số chẵn; Greater than: Lớn hơn; Repetition of digits is not allowed: Các chữ số không được lặp lại.
24. A flight of stairs has 10 steps. Peter can go up for 1 step, 2 steps or 3 steps each time. How many way(s) is / are there for Peter to go up the stairs?
Step: Bước; Way: Cách.
25. Numbers are drawn from 80 integers 20 to 99. At least how many number(s) is / are drawn at random to ensure that there are two numbers whose sum is 85?
Integer: Số nguyên; At least: Ít nhất; Random: Ngẫu nhiên; Ensure: Chắc chắn; Sum: Tổng.
~ End of Paper ~
  

Combinatorics
21. 15 students join a competition. Only top 5 students can be promoted to next round. How many different way(s) of promotion advance is / are there?
Different way: Cách khác nhau.

22. It is known that there are 8 classes of grade 5 in a primary school. At least how many students are there in grade 5 to ensure there exist 41 students in the same class?
At least: Ít nhất; Ensure: Chắc chắn; Exist: Tồn tại.

23. Choose 3 digits from 1, 2, 3, 4, 6, 8 and 0 to form 3-digit numbers. How many even number(s) greater than 300 is / are there? (The repetition of digits is not allowed)
Digit: Chữ số; 3-digit number: Số có 3 chữ số; Even number: Số chẵn; Greater than: Lớn hơn; Repetition of digits is not allowed: Các chữ số không được lặp lại.

24. A flight of stairs has 10 steps. Peter can go up for 1 step, 2 steps or 3 steps each time. How many way(s) is / are there for Peter to go up the stairs?
Step: Bước; Way: Cách.

25. Numbers are drawn from 80 integers 20 to 99. At least how many number(s) is / are drawn at random to ensure that there are two numbers whose sum is 85?
Integer: Số nguyên; At least: Ít nhất; Random: Ngẫu nhiên; Ensure: Chắc chắn; Sum: Tổng.
~ End of Paper ~

I believe that it is important to ........ uniforms when students are at school. Firstly, uniforms ............ the children to take pride in being students .......... the school they are going to because they are wearing uniforms with .......... bearing their school's name. secondly, wearing uniforms helps students feel .......... in many ways. They all start from the same place no matter they are .......... or unweathy. they are really friends to one another ........ one school roof. Last but not least, it is practical ........ wear uniform. It doesn't take you time to think of ......... to wear every day. In conclusion, all students, from ......... to high schools should wear uniforms

*Choose the best word to fill in the blank

I believe that it is (1) ....... to wear uniforms when students are at school.
Firstly, (2) .......... encourage the students to be proud of being the students of their
school. (3) ........... they are wearing the uniforms with (4) ......... bearing their school’s
name.
Secondly, wearing uniforms helps students feel (5) ........ in many ways. They all start (6)
.............. the same place no matter they are (7) .......... or poor. They are really friends to
one another (8) ............ one school roof.
Finally, it is (9) ........... to wear uniforms. It does not take you time to think of what to
wear everyday.
In conclusion, all students from primary (10) .......... high school should wear uniform.

Mọi người giúp mình với, mình đang cần gấp, xin cảm ơn ạ

III/ fill in each with one suitable word

I think it is (1)............. For students to wear uniforms when they are (2).............school

Fristly, uniforms encourage students to be proud (3)...........being students of the school they are going to because they are wearing the uniforms with (4)..............bearing their school's (5)................

Secondly, wearing uniforms help students feel equal in many ways. Everyone starts from the same place, whether they are rich or (6)............. . They're really friendly to one (7).............. under one school roof.

Finally, wearing uniforms is practical. You don't have to think of what to wear every day

Therefore, all students, from primary to (8)...............school should wear uniforms

I think it is necessary for students to wear uniforms when they are at school.
Firstly, uniforms encourage students to be proud (33)………………..being students of the school they are going to because they are wearing the uniforms with (34)………………..bearing their school’s name.
Secondly, wearing uniforms helps students (35)………………..equal in many ways. Everyone starts (36)………………..the same place, whether they are rich (37)………………..poor. They are really friends (38)………………..one another under one school roof.
Finally, wearing uniforms (39)………………..practical. You don’t have to think of what to wear every day.
Therefore, all students, from primary to high(40)………………..should wear uniforms.