Điền số thích hợp vào chỗ trống:

4 + 4 + 4 =  x  = 

Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that is closest in meaning to each of the following questions.

The accident happened as a result of the driver’s not paying attention to the road.

A. If the driver would have paid attention to the road, the accident hadn’t happened

B. Had the driver been paid attention to the road, the accident wouldn’t have happened

C. If the driver had been paying attention to the road, the accident wouldn’t have happened

D. Had the accident not happened, the driver would not have had to pay attention to the road

Tính số phần tử của các tập hợp sau

a) A = {30;31;32;...;119;120];

b)  B= {0;2;4;...;98; 100};

c)  C = {100; 104; 108;...;996; 1000}.

Tìm các số vừa không chia được cho 3 vừa không chia hết cho 9 trong tập hợp sau:  A = 132 ; 133 ; 134 ; 135 ; 143 ; 144 ; 145

Những số nào chia hết cho cả 3 và 9  trong tập hợp các số sau

A.  9 ; 27 ; 21

B.  9 ; 18 ; 27

C.  11 ; 22 ; 33

D.  9 ; 17 ; 227

Mark the letter A, B, C or D on your answer sheet to indicate the underlined part that needs correction in each of the following questions from 45 to 47.

The plant leaf has vascular tissues just as the stem and the root does.

A. does

B. just as

C. stem

D. leaf