Đáp án B

Ta thấy quy luật tích của 2 số liền trước + 2 được số liền sau

1x1+2=3

1x3+2=5

3x5+2=17

Hai số hạng tiếp theo là

5x17+2=87

17x87+2=1481

Ta có :

3 x 1 + 2 = 5

5 x 2 + 3 = 13

13 x 3 + 4 = 43

43 x 4 + 5 =177

177 x  5 + 6 = 891

891 x 6 + 7 = 5353

Vậy số cần tìm là 891

Kết quả là 891

ket qua la 891

2

what do you time have breakfast? 

. Điền từ để hỏi thích hợp vào các câu sau

1 What time do your classes start?                                           

At seven o’clock.

2 How many floors does your house have?                            

Two.

3…When does Nguyet have English?                               

  On Wednesday and Friday.

4 Where is her classroom?                                                

On the second floor.

5What do they do after school?                                    

They do their housework.

6 What does his mother do?                                          

A doctor.

7 How are the children?                                                 

They are fine.

8 Where is she?                                                                

In her room.

9How many trees are there in your school yard?                       

Fifteen

10Who are the boys?                                                   

Hung and Son, my students              

Ex2. Sắp xếp thành câu

1.                   do /what/ you /time/ breakfast/ have/?

What time do you have breakfast?

2.                   grade/ is/ he/ which /in/?

Which grade is he in?

3.                   house /where/ her/ is/?

Where is her house?

4.                   old /is/ brother/ your/ how?

How old is your brother?

5.                   do/ in/ do/ the/ morning/ what/ they/?

What do they do in the morning?

6.                   how/ are/ in/ there/ chairs/ room/ his/ many/?

How many chairs are there in his class room?

7.                   does/ have/ Literature/ when/ she/?

When does she have Literature?

8.                   time/ start/ your/ what/ class/ does/?

What time does your class start?

9.                   on/ what/ Minh/ Tuesday/ have/ does/?

What does Minh have on Tuesday?

10.               pencils/ Huong/ many/ does/ have/ how/?

How many pencils does Huong have?

11.               you/ what/ time/ do/ school/ to/ go/?

What time do you go to school?

12.               after/ what/ do/ school/ Lan/ do/ and/ brother/ her/?

What does Lan and her brother do after school?

1.                   do /what/ you /time/ breakfast/ have/?

…What time do you have breakfast……………………………………………………………………………………..

2.                   grade/ is/ he/ which /in/?

………Which grade is he in?………………………………………………………………………………..

3.                   house /where/ her/ is/?

……Where is her house?…………………………………………………………………………………..

4.                   old /is/ brother/ your/ how?

……How old is your brother?…………………………………………………………………………………..

5.                   do/ in/ do/ the/ morning/ what/ they/?

………What do they do in the morning?……………………………………………………………………………….

6.                   how/ are/ in/ there/ chairs/ room/ his/ many/?

……How many chairs are there in his room?…………………………………………………………………………………..

7.                   does/ have/ Literature/ when/ she/?

………When does she have Literature?………………………………………………………………………………..

8.                   time/ start/ your/ what/ class/ does/?

………What time does your class start?………………………………………………………………………………..

9.                   on/ what/ Minh/ Tuesday/ have/ does/?

……What does Minh have on Tuesday?…………………………………………………………………………………..

10.               pencils/ Huong/ many/ does/ have/ how/?

………How many pencils does Huong have?………………………………………………………………………………..

11.               you/ what/ time/ do/ school/ to/ go/?

………What time do you go to school?………………………………………………………………………………..

12.               after/ what/ do/ school/ Lan/ do/ and/ brother/ her/?

……What do Lan and her brother do after school?…………………………………………………………………………………..

Giải :

    Ta có:

3x1+2 = 5;

5x2+3 = 13;

13x3+4= 43;

43x4+5 = 177;

177x5 + 6 = 891;

891x6 + 7 = 5353;

                Do đó đáp án là 891 ;

2/6;3/6;5/6;8/6;13/6

ta thấy:2+3=5

3+5=8 

vậy tử của p.số tiếp theo bằng tổng 2 tử số trc

số tiếp theo:8+13/6=21/6

hghjhjjj

dãy số đâu

giúp điền lun

đè bài sai à?

Chọn C

Điên một số là 7 ạ! 

a) 1;5;7;9;13;15;17;19

b)2;6;18;54;162;468;1458;4374