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16 tháng 1 2022
B = Billion
Combinatorics21. 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...
Đọc tiếp

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 ~
  

6
13 tháng 4 2022

là seo pạn?mik hem hỉu??????????????????????

13 tháng 4 2022

Đọc cái bài mà mún trầm kẻm!

Combinatorics21. 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...
Đọc tiếp

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 ~

1
13 tháng 4 2022

chịu thoi khs quá

29 tháng 7 2021
1. Fields 2. Drawing 3. Break 4. Uniform 5. A school year 6. câu này bạn đánh sai nha phải là “ Boarding School” 7. Clubs 8. Mik nghĩ chỗ này phải thêm s vì có từ some “ Computers” Chúc bạn học tốt nha!!!!!!!😃

1. students

2. creative

3. noisy

4. mess

5. speaking

6. interesting

7. comfortable

8. favourite

9. excited

20 tháng 7 2021

cho mình hỏi cái này phải thì HTTD hay HTĐ ko bạn 

24 tháng 7 2021

1. There are only 20 ......students........... in my class [study]

2. Some ........creative........ students do drawings and paintings in the art club[creative]

3. The class is .......noisy....... students do not stop talking to each other [ noise ]

4 Your is a ......mess........ , please pick up your toys [messy]

5 .Every day , students learn English ......speak........ teacher [speak]

6 In the afternoon , they can join many ..........interesting.......clubs [interest]

7 My house is warm and .........caculation.......... in math class [ caculate] *Làm bừa ạ *

8 .What is your .........favourite........ room, Tony?[favour]

9 I'm so .....excited......... about my first day at school [excite]

2 tháng 9 2018

1. in the country

2. yes

3. no

4. There are many trees and flowers in the yard

5. play soccer in the yard

6. three floors

7. on the second floor

8. forty students

22 tháng 3 2021
Đề bài là gì đấy bạn
9 tháng 12 2016

một giáo viên có một túi kẹo cho học sinh của mình. Nếu mỗi học sinh được đưa ra 4 cái kẹo, số kẹo còn lại là 4. Nếu mỗi học sinh được đưa ra 5cái, nhất định sẽ bị thiếu 20 cái kẹo . Có bao nhiêu sinh viên đang học?

30 tháng 6 2018

There are 23 students in his classroom.