A=100²(1+2²+3²+....+10²)=100².375=375.10⁴

B=\(\frac{4^{8^{ }}.4.6^2+4^{8^{ }}.4^4}{4^8.10^2}\)=\(\frac{4^{8^{ }}.2^2.6^2+4^{8^{ }}.4^4}{4^8.10^2}\)=\(\frac{4^{8^{ }}.2^2.6^2+4^8.2^2.2^6}{4^8.2^2.5^2}\)=\(\frac{4^8.2^2\left(6^2+2^6\right)}{4^8.2^2.5^2}\)=\(\frac{6^2+2^6}{5^2}\)

B=4⁸.4.6²+4⁸.4⁴:4⁸.10²

1.traditional library/ function/ storage/ preservation/ physical items/ particularly books/ periodicals.

A traditional library functions as a storage and preservation for physical items particularly books and periodicals

2. Books/ shelves/ divided/ based/ subjects/ and/ readers/ travel/ library/ borrow books.

Books and shelves are divided based on the subjects and readers travelling in the library can borrow books

3.For/ digital library/ readers/ get/access/ materials/ house/ Internet.

For a digital library, readers get access to materials from their house on the Internet

4. Readers/ browse/ materials /based/ hyperlinks/ or keywords.

Readers browse the materials based on hyperlinks or keywords

5. With/ digital library/ we/ read/ all the books/ which/ published. world.

With a digital library, we can read all the books which are published in the world

6. Tam Coc- Bich Dong/ belong/ Trang An scenic Landscape Complex / well known/ poetic/ and/ inspirational natural scenery.

Tam Coc- Bich Dong belongs to Trang An scenic Landscape Complex well known for its poetic and inspirational natural scenery.

7. It/ second nicest cavern/ Viet Nam/ Huong Tich Cavern.

It is the second nicest cavern in Viet Nam after Huong Tich cavern

8. Bich Dong Pagoda/ built/ Le Dynasty/ Bich Dong Cavern/ name/ mean/" Green Pearl Cavern"

Bich Dong Pagoda was build in the Le Dynasty, Bich Dong Cavern's name means "Green Pearl Cavern"

9. Tam Coc Cavern/ consist/ Ca cave, Hai cave and Ba cave/ all/ offer/beautiful and mystery/tourists.

Tam Coc Cavern consists of Ca cave, Hai cave and Ba cave, all of which offer beautiful and mysterious things to tourists

10. Visit/ Tam Coc cavern / tourists/ fell/ get/ lost/ such/ hidden fairy site.

Visiting Tam Coc cavern, tourists feel like they are getting lost in such a hidden fairy site

11. In brief/it/ ideal ecological spot/lovers/nature.

In brief, it is an ideal ecological spot for lovers of nature

ta có 

R = 5(1+5²+5³+5⁴+5⁵) + 5⁷(1+...+5⁵) + ....+ 5²⁰¹⁰(1+...+5⁵)+ 5²⁰¹⁶

r = 126.(5+ 5⁷+....+5²⁰¹¹) + 5²⁰¹⁶

mà 5²⁰¹⁶ không chia hết ch 2 nên cũng không chia hết cho 126

Vậy ta có dpcm là đúng

(để ý nhóm các cặp 5 số lại ta được 2015 số đấu vào 1 nhóm còn thừ số cuôi)

Dịch các câu sau ra Tiếng Anh :
Mẹ tôi là Bác sĩ. Mẹ tôi làm việc ở bệnh viện. Mỗi sáng mẹ tôi đi làm bằng xe buýt.
---> My mother is a doctor. She works in a hospital. She goes to work by bus every morning.
Nhà tôi có một vườn rau nhỏ
---> My house has a small garden
Lan học khối 6, lớp 6A. Lớp cô ấy có 40 học sinh
---> Lan is in grade 6, class 6A. Her class has 40 students

Tôi sống ở một ngôi nhà ở nông thôn. Ở đây rất yên tĩnh
---> I live in a house in the countryside. It is very quiet here
Biển báo này báo '' Dừng lại ''. Bạn phải dừng lại. Bạn không được đi thẳng
--->This sign says "Stop". You must stop. You mustn't go straight ahead.

Chắc đề này trung gian ^^

1) Sắp xếp câu hoàn chỉnh (3)

a. to/ music?/like/listen/you/ Would/to/some/?

..................................Would you like to listen to some music?......................................

b.well/should/ Children/behave

.................................Children should behave well.......................................

c.in/What/the/is/picture/first/that/?

...........................What is in that first picture .............................................

2.Viết lại câu: (7)

EX: The house has 6 rooms

- There are 6 rooms in the house.

1.My favourite room is the bed room

-I like...........the bedroom..........best.

2.Cream cakes are delicious than bread.

Bread...................is more tasteless......................than cream cakes.

3.The book is better than the computer games.

The computer game...............is worse than.......... this blouse.

4.Dogs are more intelligent than rats.

Rats...............are more stupid..............than dogs.

5.No one is this class is taller than Minh.

Minh is........the tallest............in this class.

Bài 3: Reoder the words to make sentences

1. Are you or the circus ? going to the cinema

Are you going to the circus or the cinema?

2. is too young it. Sue to understand

Sue is too young to understand it

3. watering They are in flowers the garden.

They are watering flowers in the garden

4. swimming. to He wants to

He wants to go swimming

5. another language to speak Learning easy. is

Learning to speak another language is easy

6. club. an English I am going to speaking

I am going to an English speaking club

7. often give me books presents. My friends as

My friends often give me books as presents

8. my mother. My brother and I like look

My brother and I look like my mother

9. made from Cheese milk. Is

Cheese is made from milk

10. want a Does Mr. Smith new raincoat ?

Does Mr.Smith want a new raincoat?

Read the following letter from someone who is doing a language course in France then choose the best word to fill in the gap by circling its corresponding letter A, B, C, or D. (3 ms)

Dear Mum and Dad,
This is just a quick letter to let you know that I’m fine. We’re all working quite hard because the exams are only a few weeks away, but our teacher (1) _________ he thinks we’ll do well. (My landlady’s not so sure - she keeps (2) ________ me I should stop (3)_________ so much TV and do a bit more reading!)
Anyway, we had a wonderful time at half-term. I went off to Paris for (4) ________ days with some of the others from the school, and we went on a guided (5) _________ of the city. We saw most of the famous (6) ___________ like the Louvre, where they have an amazing (7)__________ of paintings, and the Eiffel Tower. Then, we went down to the South of France (8)__________ train. It was so fast – the whole (9)_________ was only about four hours. We spent (10)_________ time in Nice and in Cannes as well, and we all really enjoyed it. On our last day, we went to a small island (11)________ the Ile des Pelerines, and we saw the castle where they used to keep the “Man in the Iron Mask”. All in all, we had a great time and (12)_________ weather was really good as well. The only thing I felt (13)_________ about was that we didn’t have enough time to (14)________ to go swimming – maybe next time.
Anyway, I must go now as I’ve got to (15)_________ a bit of homework for tomorrow.
Love,

Janie

1. A. says B. tells C. speaks D. talks
2. A. saying B. telling C. speaking D. talking
3. A. watch B. watched C. to watch D. watching
4. A. a little B. little C. a few D. few
5. A. trip B. visit C. tour D. excursion
6. A. shows B. sights C. views D. looks
7. A. set B. group C. gallery D. collection
8. A. in B. by C. with D. on
9. A. voyage B. travel C. drive D. journey
10. A. a little B. little C. a few D. few
11. A. spoken B. said C. called D. told
12. A. any B. a C. the D. those
13. A. sorry B. apologetic C. displeased D. regretful
14. A. spend B. waste C. spare D. take
15. A. make B. do C. solve D. see

There are 10 blanks in the passage. Use the words (phrases) given in the box to fill in the blanks. Use only one word (phrase) in each blank. There are five extra words (phrases) which you do not need to use. (2 ms)

place, easily, alike, bury, carry, contain, imitated, interfered, most, prevent, protect, role, serve, surviving, tamed

Man probably could not live without the help of animals. The (1)___role___ of animals in the balance of nature ranks as their most important service to man.

Animals also (2)___serve___ man by supplying him with many foods and other useful products. Without animals, man would have no meat, milk, eggs, or honey; or wool, fur, or silk.

For thousands of years, man has caused changes in the animal kingdom. He has (3)___tamed___ many kinds of animals and used them for food and clothing. He has killed or driven away animals that once attacked him or (4)___interfered___ with his use of land. Today, he tried to (5)___protect___ many kinds of animals that are in danger of dying out.

Like man, (6)___most___ plants depend on animals for many of their basic needs. Without animals, many plants could not (7)___easily___ reproduce. For example, many plants with flowers depend on bees and other insects to (8)__carry____ their pollen from plant to plant. Many oak trees grow from acorns that squirrels (9)___burry___ and then forget, or from acorns that deer step on and push deep into the soil. Birds often fly from one (10)___place___ to another with seeds clinging to their feet. The seeds may sprout a great distance from the parent plants.

. Rewrite the sentences in such a way that they mean almost the same as those printed before them. (2 ms)

1. They have just introduced a new style of Jeans in the USA.

A new style of Jeans has just been introduced in the USA

2. What a pity I can’t speak English well.

I wish i could speak English well

3. Keep your feet dry or you will get a cold.

If you keep your feet dry, you won't get a cold

4. “Do you sometimes go to the English Speaking Club?” Mrs.Brown asked.

Mrs.Brown asked me if i sometimes went to the English Speaking Club

5. “Let’s go abroad for our holiday this year,” said Mr.Ba.

Mr.Ba suggested going abroad for our holiday this year

6. Mr Jones remembered the date of wedding, and so did his wife.

Mr Jones didn’t forget the date of wedding and his wife didn't, either

7. There is a great danger in driving too fast

Driving too fast is greatly dangerous

8. She last ate this kind of food in January.

She hasn’t eaten this kind of food since January

9. “Where do you live, Nam?” Mary asked

Mary asked Nam where he lived

10. No one can answer this question.

This question can't be answered