do có 1 c/số 4 nên c/số còn lại  là

11-4=7

=>c/số còn lại là 7

=>hai số đó là 47 va 74

Question I.The following passage contains ten mistakes. Identify and correct them. (10pts)

If there is one characteristic of British work in the arts that seems to stand out is its shortage of identification with wide intellectual trends. Playwrights and directors can be left-wing in their political lout-out, but the plays they produce rarely convey a straightforward message. The same is largely true of British novelists and poets. Their writing is naturalistic and is not connected to particular intellectual movements. The theatre had always been very strong in Britain, especially in London. The country’s most successful playwrights are those who explore the darker side of the personality and of personal relationships. In contrast, the cinema in Britain is often regarded as not quite part of the arts in all, it is simply entertainment. Britain is unique between the large European countries in giving mostly no financial help to their film industry. Classical music is also a minority interest. British seem disinterested in high education, they watch lots of television, but are enthusiastic readers. The vast minority of books reading in Britain are not classified as serious literature.

Question II:The following passage contains ten mistakes. Identify and correct them. (10pts)

I have a briefcase full of papers which describes cases Sherlock Homes has investigated. Some are failures since there were some final explanations for the mysteries in question. A problem without a solution may interest the specialist, but will offer little to the general reader. Among these finishing stories is that of the yacht Alicia, which one morning sailed into the mist and disappeared forever; the vessel along the crew were never seen again. Then there was the case of the well-known journalist Luigi Persano, who found completely mad with a jar in front of him. A jar contained a remarkable worm, unknown by science up to that point. Apart from these mysterious cases to which Holmes did not find solution, there are those which various influence people would rather no see on print and those which might affect the reputation of Holmes himself, for whom I have more respectness than for any man alive

Fill in the blanks with suitable word

..(1) has been a lot of discussion recently about the presentation of news on televisiọn It is said that there is more violence than in the worst horror...(2. It is necessary to bring the full horror of tragic events...(3) people's living rooms? How can children be turned away from violence if they see that the world is full of it? For...(4), in Northern Ireland, there seems to be no possibility of a normal...(5).
It is also...(6) question of whether television is used to influence people in favour of or...(7) a particular country or political party. It could be very dangerous because this can be happen without people realising it. Really, there...(8) be stricter on what is broadcast to the natiọn

1.Cho biểu thức C=\(\frac{x+2}{x^2+x+1}-\frac{2}{x-1}-\frac{2x^2+4}{1-x^3}\)

a, Rút gọn C

b,So sánh C và \(\frac{1}{3}\)

2.Cho biểu thức D=\(\frac{3x}{x-3}-\frac{8x+3}{2x+1}-\frac{70}{2x^2-5x-3}\)

a, Rút gọn D

b, Tính giá trị của D biết |x+3|=7

c, Tìm x nguyên để D nguyên

3.Cho biểu thức E =\(\frac{x-1}{2}:\left(\frac{x^2+2}{x^3-1}-\frac{x}{x^2+x+1}+\frac{1}{1-x}\right)\)

a, Rút gọn E

b, Chứng minh rằng E> 0 với mọi x khác 1

C, Tìm giá trị nhỏ nhất của E

Trong violympic phải không bạn !Chắc chắn luôn đấy !

Bài giải : Nếu chữ số 0 ở hàng đơn vị thì sẽ ở hàng trăm và hàng chục tạo thành 81 số không có chữ số 0 (ab0). Nếu hàng chục là chữ số 0 thì ở hàng trăm và hàng đơn vịtạo thành 81 số không có chữ số 0 (a0c).  Ngoài ra còn có 9 số có hai chữ số 0 là 100. 200.,,,. 800, 900. Vậy có 81+81+9= 171 số.
Trả lời: Có tất cả 171 số.

1.You don't smoke........?
A.had you
B.have you
C.do you
D.are you
2.My father is too old ..............
A.for traveling
B.to travel
c.travel
D.traveling
3.It's....................to stay here this summer vacation
A.wonder
B.wonders
C.wonderful
D.wonderland
4.There is a..................flight at 10 am
A.daily
B.day
C.days
D.date
5.I'm not good ........remembering names
A.for
B.in
C.to
D.at
6.This novel....................into EL by a famous professor
A.is translate
B.was translate
C.was translated
D.translated
7.Chinese ....by Mai for 4 years when she was at university
A.has learnt
B.has been learnt
C.was learnt
D.is learnt