Có một số bi chia thành 8 túi, mỗi túi được 14 viên bi. Hỏi muốn chia số bi đó thành mỗi túi 4 bi thì chia được bao nhiêu túi?

Phương trình m − 1 x 2 + 3 x − 1 = 0. Phương trình có nghiệm khi:

A.  m ≥ − 5 4

B.  m ≤ − 5 4

C.  m ≠ 1 m ≥ − 5 4

D.  m = − 5 4

Cho một lượng bột Zn vào dung dịch X gồm F e C l 2   v à   C u C l 2 . Khối lượng chất rắn sau khi các phản ứng xảy ra hoàn toàn nhỏ hơn khối lượng bột Zn ban đầu là 0,5 gam. Cô cạn phần dung dịch sau phản ứng thu được 13,6 gam muối khan. Tổng khối lượng các muối trong X là

A. 13,1 gam

B. 17,0 gam

C. 19,5 gam

D. 14,1 gam

Biểu thức P = 3 4 + 2 5 : 3 7 + 3 5 + - 1 4 : 2 3 có giá trị

A. 1

B. 2

C. 0

D. 3

Cho tam giác vuông có cạnh huyền bằng 20 cm. Hai cạnh góc vuông có độ dài hơn kém nhau 4 cm. Một trong hai cạnh góc vuông của tam giác vuông có độ dài là:

A. 16

B. 15

C. 14

D. 13

Find the mistakes

C => didn’t go.

A. wouldn't be

B. if

C. doesn't go

D. when

Tính nhanh tổng 53 + 25 + 47 + 75?

A. 200     

B. 201     

C. 300     

D. 100

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 pioneering study by Donald Appleyard made the astounding discovery that a sudden increase in the volume of traffic through an area affects people in the way that a sudden increase in crime does. Appleyard observed this by finding three blocks of houses in San Francisco that looked much alike and had the same kind of middle-class and working-class residents, with approximately the same ethnic mix. The difference was that only 2,000 cars a day ran down Octavia Street (LIGHT street, in Appleyard’s terminology) while Gough Street (MEDIUM street) was used by 8,000 cars daily, and Franklin Street (HEAVY street) had around 16,000 cars a day. Franklin Street often had as many cars in an hour as Octavia had in a day.
          Heavy traffic brought with it danger, noise, fumes and soot, directly, and trash secondarily. That is, the cars didn’t bring in much trash, but when trash accumulated, residents seldom picked it up. The cars, Appleyard determined, reduced the amount of territory residents felt responsible for. Noise was a constant intrusion into their homes. Many Franklin Street residents covered their doors and windows and spent most of their time in the rear of their houses. Most

families with children had already left.
          Conditions on Octavia Street were much different. Residents picked up trash. They sat on their front steps and chatted with neighbors. They had three times as many friends and twice as many acquaintances as the people on Franklin.
          On Gough Street, residents said that the old feeling of community was disappearing as traffic increased. People were becoming more and more preoccupied with their own lives. A number of families had recently moved and more were considering. Those who were staying expressed deep regret at the destruction of their community.

Which of the following is NOT a statement you would expect from a resident of Gough Street?

A. People on this street are unhappy because the neighborhood is deteriorating.

B. People on this street think mostly of themselves.

C. People on this street have more and more space for which they feel responsible.

D. A number of people are preparing to leave this street.