Hiệu của hai số là 50. Số thứ nhất bằng $\frac{{11}}{6}$ số thứ hai. Hai số đó là:

Trong các cặp phân số sau, cặp phân số nào không bằng nhau?

Có ba quả cam chia cho 7 người. Hỏi mỗi người được bao nhiêu phần quả cam?

Hiệu của hai số là 50. Số thứ nhất bằng $\frac{{11}}{6}$ số thứ hai. Hai số đó là:

Một thửa ruộng hình chữ nhật có chiều dài là 15m. Chiều rộng bằng $\frac{1}{5}$ chiều dài. Trên mỗi mét vuông đất, trung bình người ta trồng được 8 cây lạc. Hãy tính tổng số cây lạc được trồng trên thửa ruộng nói trên.

Phân số chỉ phần đã tô màu trong hình sau là:

Chỉ ra kết quả sai.
Phân số bằng phân số $\frac{{40}}{{90}}$ là:

Hai số có tổng là 65. Biết rằng nếu ta thêm vào số lớn 4 đơn vị thì hiệu giữa hai số khi đó là 23. Số lớn ban đầu là:

Một tấm lưới sắt hình chữ nhật có chiều dài $\frac{{15}}{4}m$, chiều rộng $\frac{2}{3}m.$ Tấm lưới được chia thành 5 phần bằng nhau. Diện tích của mỗi phần là:

Trong các khẳng định sau, khẳng định nào sai?

Một bác thợ mộc cưa một khúc gỗ dài 3,6dm thành 3 đoạn ngắn có độ dài bằng nhau. Hỏi nếu muốn có 20 đoạn gỗ như thế thì bác cần một khúc gỗ dài bao nhiêu mét?

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions:

A survey is a study, generally in the form of an interview or a questionnaire, which provides information concerning how people think and act. In the United States, the best-known surveys are the Gallup poll and the Harris poll. As anyone who watches the news during presidential campaigns knows, these polls have become an important part of political life in the United States. North Americans are familiar with the many “person on the street” interviews on local television news shows. While such interviews can be highly entertaining, they are not necessarily an accurate indication of public opinion. First, they reflect the opinions of only those people who appear at a certain location. Thus, such samples can be biased in favor of commuters, middle-class shoppers, or factory workers, depending on which area the new people select. Second, television interviews tend to attract outgoing people who are willing to appear on the air, while they frighten away others who may feel intimidated by a camera. A survey must be based on a precise, representative sampling if it is to genuinely reflect a broad range of the population. In preparing to conduct a survey, sociologists must exercise great care in the wording of questions. An effective survey question must be simple and clear enough for people to understand it. It must also be specific enough so that there are no problems in interpreting the results. Even questions that are less structured must be carefully phrased in order to elicit the type of information desired. Surveys can be indispensable sources of information, but only if the sampling is done properly and the questions are worded accurately. There are two main forms of surveys: the interview and the questionnaire. Each of these forms of survey research has its advantages. An interviewer can obtain a high response rate because people find it more difficult to turn down a personal request for an interview than to throw away a written questionnaire. In addition, an interviewer can go beyond written questions and probe for a subject’s underlying feelings and reasons. However, questionnaires have the advantage of being cheaper and more consistent.

Question: What does the passage mainly discuss?           

Tìm hệ số của trong khai triển                                 

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions:

U.N diplomats abandoned efforts to draft a treaty that would outlaw human cloning. They will likely settle for a weaker statement, and won't seek a widespread ban, officials said. The debate began when Italy introduced document into the U.N to stop any attempt at cloning human life. The Belgians objected to the use of term "human life" in the document, because they feared it would put a stop to all forms of human cloning.
There is near universal support among the United Nation's 191 members for a ban on reproductive cloning-creating cloned babies. Many countries have wrested over whether to allow cloning for stem cell and other types of research. Indeed, many researchers beleive that stem cells could be used to repair nerve tissue or cure diseases, including Alzheimer's. Stem cells are taken from embryos and cloned, but extracting these cells kills the embryo. Opponents say that this is equal to murder.

Question: Why are some countries “wrestling” over whether to ban cloning or not?

Một trường THPT có lớp , mỗi lớp cử học sinh tham gia vẽ tranh cổ động. Các lớp tiến hành bắt tay giao lưu với nhau (các học sinh cùng lớp không bắt tay với nhau). Tính số lần bắt tay của các học sinh với nhau, biết rằng hai học sinh khác nhau ở hai lớp khác nhau chỉ bắt tay đúng lần.                                 

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions:

U.N diplomats abandoned efforts to draft a treaty that would outlaw human cloning. They will likely settle for a weaker statement, and won't seek a widespread ban, officials said. The debate began when Italy introduced document into the U.N to stop any attempt at cloning human life. The Belgians objected to the use of term "human life" in the document, because they feared it would put a stop to all forms of human cloning.
There is near universal support among the United Nation's 191 members for a ban on reproductive cloning-creating cloned babies. Many countries have wrested over whether to allow cloning for stem cell and other types of research. Indeed, many researchers beleive that stem cells could be used to repair nerve tissue or cure diseases, including Alzheimer's. Stem cells are taken from embryos and cloned, but extracting these cells kills the embryo. Opponents say that this is equal to murder.

Question: Which of the following can be inferred from his passage?

Tìm số hạng không chứa trong khai triển

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions:

U.N diplomats abandoned efforts to draft a treaty that would outlaw human cloning. They will likely settle for a weaker statement, and won't seek a widespread ban, officials said. The debate began when Italy introduced document into the U.N to stop any attempt at cloning human life. The Belgians objected to the use of term "human life" in the document, because they feared it would put a stop to all forms of human cloning.
There is near universal support among the United Nation's 191 members for a ban on reproductive cloning-creating cloned babies. Many countries have wrested over whether to allow cloning for stem cell and other types of research. Indeed, many researchers beleive that stem cells could be used to repair nerve tissue or cure diseases, including Alzheimer's. Stem cells are taken from embryos and cloned, but extracting these cells kills the embryo. Opponents say that this is equal to murder.

Question: The word “extracting” in the passage is closest in meaning to ________.         

Tìm số hạng không chứa x trong khai triển biểu thức         

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions:

U.N diplomats abandoned efforts to draft a treaty that would outlaw human cloning. They will likely settle for a weaker statement, and won't seek a widespread ban, officials said. The debate began when Italy introduced document into the U.N to stop any attempt at cloning human life. The Belgians objected to the use of term "human life" in the document, because they feared it would put a stop to all forms of human cloning.
There is near universal support among the United Nation's 191 members for a ban on reproductive cloning-creating cloned babies. Many countries have wrested over whether to allow cloning for stem cell and other types of research. Indeed, many researchers beleive that stem cells could be used to repair nerve tissue or cure diseases, including Alzheimer's. Stem cells are taken from embryos and cloned, but extracting these cells kills the embryo. Opponents say that this is equal to murder.

Question: The phrase “universal support” means ________.

Tìm hệ số của số hạng chứa trong khai triển của biểu thức .