Tìm các số có 4 chữ số mà tổng các chữ số bằng 3. Trong đó số nào là số lớn nhất, số nào là số bé nhất ?

Cho hình chữ nhật có nửa chu vi là 120m, nếu bớt chiều dài đi 20m thù hình đó sẽ thành hình vuông. Tính kích thước hình chữ nhật đó

Hệ chế nhà nước của phương Đông và phương Tây có gì khác nhau ? Vì sao có sự khác nhau đó?

Thả rơi một vật từ độ cao 125m. Lấy g = 10m/s2. a.Tính quãng đường vật rơi trong giây đầu tiên và giây cuối cùng. b. Thời gian để vật đi hết 20m đầu tiên và 20m cuối cùng. Giúp e với ạ🙇‍♀️

cho đương tròn tâm O đường kính AC vẽ tiếp tuyến Ax lấy m thuộc Ax kẻ tiếp tuyến MB với đường tròn ( B là tiếp điểm). a, chứng minh OM vuông AB.b,kẻ BH vuông AC chứng minh BA là phân giác của goác MBH.c, nối M,C cắt BH tại điểm K chứng minh KB=KH

Một mảnh đất hình chữ nhật chiều dài15 1/2m, chiều rộng 8 1/3 m. Tính chu vi và diện tích mảnh đất đó.

1 tính giá trị biểu thức f) x( x + 1)- y( x +1) tại x = 99, y = 9 d) x2 – 4x + 4 tại x = 62

1. He made her leave early this morning.     She _______________________________________________________________. 2. My mother let me go out with my friends.     I was ______________________________________________________________ 3. No one wants to be deceived by another person.     No one enjoys _______________________________________________________ 4. Peter didn’t see me when I was climbing over the wall.     I avoided ___________________________________________________________ 5. Everyone trusts the man living in the same dorm.     That man who _______________________________________________________ 6. The manager certainly needs to consider the whole problem carefully.   The whole problem certainly need______________________________________ 7. Helen expects other people to praise her.     Helen expects to _____________________________________________________ 8. My father took me to the zoo when I was a child.     I remember _________________________________________________________ 9. Mr. Cruise’s company will transfer him to London.     Mr. Cruise hopes ____________________________________________________ 10. Naturally, I enjoy being promoted to a higher position.       Naturally, I would ___________________________________________________

Question 15 : If you need to reach us, we_____at the Fairmont Hotel that time. A. have been staying B. are staying C. will be staying D. had been staying Question 16 : We_____you as soon as we arrive in Paris. A. will call B. call C. have called D. would call Question 17 : You_____yourselves in the Caribbean, while we’re stuck here in New York with this cold weather. A. are staying B. will be enjoying C. have been staying D. had been staying Question 18 : Susan_____credit card payments until her debt is all paid off. A. make B. have made C. are made D. will make Question 19 : The sky is very black. It_____. A. snows B. is snowing C. is going to snow D. will snow Question 20 : But all these things_____if you marry me. A. will happen only B. will only happen C. happen D. are going to happen Question 21 : I haven't made up my mind yet. But I think I_____something nice in my mum's wardrobe. A. am going to B. will find C. am finding D. was finding Question 22 : My horoscope says that I_____an old friend this week. A. meet B. will meet C. am meeting D. meets Question 23 : At this time next Friday evening Mrs. Almanac_____refreshments for her son’s engagement party and_____her future daughter-in-law. A. will prepare - will be helping B. will be preparing - will be helping C. will be preparing - will help D. will prepare - will have helped Question 24 : By the end of next year, Geoge_____English for 2 years. A. will have learned B. will learn C. has learned D. would learn Question 25 : When will you send the message? - We_____it by Friday. A. will deliver B. am going to deliver C. will be delivering D. will have delivered Question 26 : Can we start the party at 3 o'clock? - I don't think so. All our guests _____by then. I'm afraid. A. won't have arrived B. don't arrive C. haven't arrived D. didn't arrive Question 27 : - What does a blonde say when she sees a banana skin lying just a few metres in front of her? - Oh dear! I_____. A. to slip B. will slip C. am sliping D. am going to slip Question 28 : Here is the weather forecast. Tomorrow_____dry and sunny. A. is going to be B. will be C. is D. would be

Tìm các số có 4 chữ số mà tổng các chữ số bằng 3. Trong đó số nào là số lớn nhất, số nào là số bé nhất ?