Số cách được 5 chấm là: (4,1)(2,3)(3,2)(1,4)=>4 cách

Số cách đạt được 8 chấm là : (2,6)(6,2)(3,5)(5,3)(4,4)=>5 cách

Số cách đạt được 12 chấm là :(6,6)=>1 cách

Vậy khả năng xuất quân cao nhất thuộc về Mai vì có tận 5 cách đạt được 8 chấm .

I. 

II.  Choose the correct answer A, B, or C.(Chọn câu trả lời đúng A, B hay C.)

1. We ________ new subjects for this school year.

A. have                     B. has                        C. having

2. Duy ________ to school every day.

A. cycling                    B. cycle                      C. cycles

3. My new school________  in the centre of the vilage.

A. not                            B. isn't                     C. doesnt

4. I live near here. Where________live?

A. do you                   B. you                         C. are you

5. My friend has a sister, but she________ brother.

A. not has                  B. don't have             C. doesn't have

III. Complete the sentences with the present simple.(Hoàn thành câu với thì hiện tại đơn.)

1. He (come)___comes______ from Da Nang.

2. - Do you learn Russian?

- No, I (not do) _____don't____ .

3. She always (walk) ____walks_____to school with her friends.

4.  I often (do) ____do_____ my homework after school.

5. Mr Nam (teach) ____teaches_____ history at my school.

IV. Complete the text with the correct form of the verbs in brackets.

(Hoàn thành văn bản với dạng đúng từ động từ trông ngoặc.)

Ba lives in a small house in the centre of his village. His house (1. be)__is______ near his new school. Everyday, he (2. have) ___has_____ breakfast at 6 o'clock Then he (3. walk) ____walks____ to school with his friends. Ba and his friend (4. study) _____study___in grade 6 at Me Linh School. Ba (5. like) ___likes_____his new school.

V. Put the adverb in brackets in the correct place in each sentence.

(Đặt trạng từ trong ngoặc vào vị trí đúng trong mỗi câu.)

1.   I always remember to do my homework. 

2.   Nick usually gets good marks in exams. 

3.   We often do not see a rabbit in town. 

4.   I rarely read in bed at night. 

5.   Do you sometimes sing in the shower? 

VI. Using the verb Tobe in present tense.

1) Tiffany and Uma (be) ________are____________my friends.

2) Ricardo, John and I (be) _______are_________ watching a movie.

3) Hadil (be) _______is_________ kind.

4) Alisa (be) _________is___________ young.

5) The hammer (be) ____is___________ new.

6) My mother and father (be) ___are____________ cooking dinner.

7) Rachel (be) ___________is________ driving to school.

8) Nikos and Billy (be) ______are_______________ playing at the park.

9) The students (be) __________are____________ studying English.

10) The test (be) ________________is___________ hard!

11) My best friend (be) _____________is__________ coming to my house

12/ The bag (be) ____is____ blue.

13/ The rocks (be) ____are____ hard.

14/ The children (be) _____are___ young.

15/ Thomas (be) ____is____ nice.

16/ The game (be) ____is____ difficult.

17/ They (be) ____are____ tired.

18) I (be) ___am_____ thirty years old.

19) Susan and Juan (be) __are______ married.

20) Teddy (be) ____is____ my friend.

21/ The old man (be) _is_______ wise.

22) The sun (be) ______is__ hot.

23) The children (be) ____are____ eating bananas. They (be, not) __aren't__ ____ eating apples.

24) I (be) _____am___ happy. I (be, not) __am not__ ____ sad.

25) The bus (be) _____is___ fast. It (be, not) __isn't__ ____ slow.

26) My friend (be) ____is____ buying a new car. Her old car broke down.

27) I (be) __am______ at the beach with my family. It (be) ___is_____ hot and sunny outside. The ocean water (be) __is______ warm.

28) Tom and Jacob (be) __are___ very smart. Tom (be) __is____ a scientist and Jacob (be) ___is___ an engineer.

29) The library (be) _____is___ open until 9:00 p.m.

30) The school (be) _____is___ small. It (be, not) __isn't__ ____ big.

VII : Fill in the blanks with the correct form of “be”

1. My dog …………is………………..small.

2. You ………………are…………….responsible.

3. My cat ………………is……………soft.

4. Dogs …are………………..great pets because they ………are…………..affectionate.

5. My dog ………is………….a member of our family.

6. Some cats ……are………………affectionate. Other cats ………are……..very independent.

7. It ……is………..a bid responsibility to own a pet.

8. Kittens and puppies ……are………….cute.

9. We ………are………ready to get a pet.

10. Some people ……………are……lonely.

11. My daughter and I ……are…….at the pet shop. We …are………at home.

12. My husband ………is……….at work now. He (not)……isn't………..with me.

13. I ……am………..patient. My husband (not)……isn't……………….patient.

14. My daughter …………is……….responsible.

15. My son …………is…….excited. He ……is……….tired.

16. This …………is……..a lap. It ……is…..a big dog.

17. The children ……are…………excited about the new puppy.

18. My dog ………is………in the yard. It………is………..hungry.

19. There ……are……….toys for dogs. They ……are……………..inexpensive.

20. The window……is………..open. I ……am……..cold.

21. It ………is………ten o’clock now. The weather ………is………..warm today.

22. My husband …is……from California. I ……am………..from New York.

23. The dogs ………are……..thirsty. put some water in the dish.

24. I ……am………worried about my cat because it …is………..sick.

25. That …is…………a picture of my dog.

VIII . Choose the correct form of the verb in simple present tense.

1) I (study) …study………………..….English on Monday.

2) You (study) ……study………..…….English on Tuesday.

3) We (study) …………study….….English on Wednesday.

4) They (study) ……study………….English on Thursday.

5) He (study) …………..studies……….English on Friday.

6) She (study) …………studies..…….English on Saturday.

7) It (study) ……studies………….…….English on Sunday.

8) They (study) …………study………… English on Tuesday.

9) He (cook) ………cooks…….……….on Tuesday.

10) I (wash) …………wash……….…the car on Wednesday.

11) We (cook) ……………cook…..……on Sunday.

12) You (wash) …………wash…..………the car on Friday.

13) She (wash) ………………washes..…… the car on Saturday.

14) We (study) ………study………….. English on Sunday.

15) It (cook) ……cooks…………….……..on Thursday.

16) He (study) …………studies..……….English on Friday.

17) You (wash) ……wash…………….the car on Thursday.

18) They (cook) ………….cook.…….on Wednesday.

IX: Put DO or DOES into the following sentences to make questions

1. …………..Do……the students study hard every day?

2……………Does.…Mr. Brown go to his office every day?

3. ………Do………..you want cream and sugar in your coffee??

4. …………Do…..…the children go to bed very early?

5. ……Does…………...that girl come from South Africa?

6.  ………Do………you know that Italian student?

7. ……Does……….. Miss Lan prefer coffee to tea?

8. ………Do………..your English lessons seem very difficult?

X: Comple the sentences ( Hoàn thành các câu sau)

1) Tom ………doesn't collect………….……… coins. (not/to collect)

2) You ……………don't sing…………..… songs in the bathroom. (not/to sing)

3) Julian ……………doesn't work…..……… in the garden. (not/to work)

4) I ……………don't stay…………….… at home. (not/ stay)

5) Tina and Kate ….…don't open…………… the doors. (not/to open)

6) Adam ………….doesn't speak.……… French. (not/to speak)

7) His sister ……….doesn't like………… lemonade. (not/to like)

1) Tom doesn't collect coins. (not/to collect)

2) You don't sing songs in the bathroom. (not/to sing)

3) Julian doesn't work in the garden. (not/to work)

4) I don't stay at home. (not/ stay)

5) Tina and Kate don't open the doors. (not/to open)

6) Adam doesn't speak French. (not/to speak)

7) His sister doesn't like lemonade. (not/to like)

8) We don't listen to music. (not/to listen)

9) My father doesn't clean the car every Saturday. (not/ to clean)

10) Johnny and Danny don't swim in the lake. (not/ to swim)

1) Tom ……………doesn't collect…….……… coins. (not/to collect)

2) You ……………don't sing…………..… songs in the bathroom. (not/to sing)

3) Julian …………doesn't work……..……… in the garden. (not/to work)

4) I ………………don't stay………….… at home. (not/ stay)

5) Tina and Kate ….……don't open………… the doors. (not/to open)

6) Adam ………….doesn't speak.……… French. (not/to speak)

7) His sister ……doesn't like….………… lemonade. (not/to like)

8) We …………don't listen……… to music. (not/to listen)

9) My father …………doesn't clean……… the car every Saturday. (not/ to clean)

10) Johnny and Danny ………don't swim………… in the lake. (not/ to swim)

1.   I always remember to do my homework. 

2.   Nick usually gets good marks in exams. 

3.   We often do not see a rabbit in town. 

4.   I rarely read in bed at night. 

5.   Do you sometimes sing in the shower? 

1-I always remenber to do my homework.

2-Nick usually gets good mark in ( the) exams. { thiếu The }.

3-We don't often see a rabbit in town.

4-I rarely read in bed at night.

5-Do you sometimes sing in the shower?

mik nghĩ là 9:)))

có 3 lựa chọn hàng trăm, mỗi lựa chọn hàng trăm có 2 lựa chọn hàng chục, mỗi lựa chọn hàng chục có 1 lựa chọn hàng đơn vị.

vậy cố tất cả số số là:3x2x1=6( số)

A bạn nhé

Câu a bạn nhé

1.

gọi số hàng chục là a,số hàng đơn vị là b.ta có 10a+b+2a +2b =12a+3b=87 =>4a+b=29

+nếu a =7 => b=1

+nếu a=6 =>b=5

+nếu a=5 =>b=9

+nếu a>7 hoặc a<5 => vô ngiệm vì b nguyên ,từ 0 đến 9.vậy bài toán có 3 nghiệm 59,65 và 71.nhưng số TN chia hết cho 5 là 65.

vậy số cần tìm là 65.

2.nếu số đó cùng chia hết cho 11 và 13 

vì 11 và 13 là số nguyên tố nên BCNN của 11 và 13 là:11.13=143

lại có 143 lớn hơn 100 nên ko có số nào 

nếu số đó chia hết cho 11 và chia hết cho 13 riêng thì bn liệt kê là đc

(bài 2 mik ko hiểu rõ đề bài nên làm 2 cách nha)

(MONG BẠN TICK CHO MIK)

Trong toán học chữ số thì chỉ có 9 chữ số, làm gì có 100 chữ số em ơi.

Số điểm còn lại là 30-a(điểm)

TH1: Vẽ 1 đường thẳng đi qua 2 điểm trong a điểm thẳng hàng

=>Có \(C^2_a\left(đường\right)\)

TH2: Chọn 1 điểm trong a điểm thẳng hàng, chọn 1 điểm trong 30-a điểm còn lại

=>Có \(a\left(30-a\right)\left(đường\right)\)

TH3: Chọn 2 điểm trong 30-a điểm còn lại

=>Có \(C^2_{30-a}\left(đường\right)\)

Theo đề, ta có:

\(C^2_a+a\left(30-a\right)+C^2_{30-a}=421\)

=>\(\dfrac{a!}{\left(a-2\right)!\cdot2!}+a\left(30-a\right)+\dfrac{\left(30-a\right)!}{\left(30-a-2\right)!\cdot2!}=421\)

=>\(\dfrac{a\left(a-1\right)}{2}+a\left(30-a\right)+\dfrac{\left(a-29\right)\left(a-30\right)}{2}=421\)

=>\(a\left(a-1\right)+2a\left(30-a\right)+\left(a-29\right)\left(a-30\right)=842\)

=>\(a^2-a+60a-2a^2+a^2-59a+870=842\)

=>870=842(loại)

=>Không có giá trị nào của a thỏa mãn

 \(a,3a+2b⋮17\\ =>17a+3a+2b⋮17\\ =>20a+2b⋮17\\ =>2\left(10a+b\right)⋮17\\ =>10a+b⋮17\)

\(b,xy+x-y=4\\ x\left(y+1\right)-y=4\\ x\left(y+1\right)-y-1=4-1\\ x\left(y+1\right)-\left(y+1\right)=3\\ \left(x-1\right)\left(y+1\right)=3\\ Ư\left(3\right)=\left\{1;-1;3;-3\right\}\\ Th1:x-1=1=>x=2;y+1=3=>y=2\\ Th2:x-1=3=>x=4;y+1=1=>y=0\\ Th3:x-1=-1=>x=0;y+1=-3=>y=-4\\ Th4:x-1=-3=>x=-2;y+1=-1=>y=2\)