Gọi số học sinh là a
Ta có: a ∈ BC (18;20;36) và 500<a<600
Mà : 18 = 2.3²
20 = 2².5
36 = 2².3²
⇒BCNN (18;20;36) = 2².3².5 = 180
⇒BC (18;20;36) = {0;180;360;540;.....}
⇒ a = 540
Đáp án:
$x ∈ BC (18;20;36) & 500<x<600$
$18 = 2.3²$
$20 = 2².5$
$36 = 2².3²$
⇒$BCNN (18;20;36) = 2².3².5 = 180$
⇒$BC (18;20;36) = {0;180;360;540;.....}$
⇒ $a = 540 $
Mn giúp mik giải vs ak Mik cảm ơn
Bỏ hòn đá có thể tích 20cm3 vào bình chia độ , thì nước trong bình dâng lên vạch 220cm3 . tiếp tục bỏ viên bi sắt vào bình chia độ thì nước trong bình dâng lên vạch 250 cm3 . a) Tính thể tích viên bi sắt ? b) Tính thể tích nước trong bình chia độ ?
lam bai 7 tinh tong giup minh nhe toan 6 40 diem
Câu 1: Sàng tiền minh nguyệt quang, 1. Chép các câu còn lại hoàn thiện bài thơ trên. 2. Bài thơ trên có nhan đề là gì? Do ai sáng tác? 3. Chủ đề chính của bài thơ này là gì? .
Mong mọi người sẽ giúp e bài này ạ
I. Find a word which has a different sound in the underlined part ( Do k có dấu gạch chân nên em sẽ thay vào đó là dấu ngoặc nha ) 1. A. d(i)vide B. m(i)nority C. rel(i)gion D. s(i)mple 2. A. ask(ed) B. watch(ed) C. play(ed) D. laugh(ed) 3. A. get(s) B. bring(s) C. take(s) D. stop(s) 4. A. chur(ch) B. (ch)ildren C. (ch)oice D. (ch)emistry II. Choose the word whose main stress is placed differently from the rest. 1. A. improve B. entrance C. attract D. vacation 2. A. exhibition B. volunteer C. convenient D. entertainmen B. VOCABULARY AND GRAMMARI. Question 1: She ………………………in this area since she was young. A. have lived B. has lived C. was living D. lived Question 2: When we …………to the craft village, the artisans …………..the table skillfully. A. come/ cast B. were coming/ were casting C. came/ were casting D. was coming/ cast Question 3: ………………..……play an important role in the economy of the ethnic groups. A. Grow and hunt B. Grow and hunting C. Growing and hunting D. Hunting and grow Question 4: All visitors were impressed ………………….the beauty of the city. A. by B. on C. of D. about Question 5: YMoan was called………singer of the woods. He made ……..important contribute to his village. A. a/ the B. the/ an C. the/ a D. an/ the Question 6. City drivers have to drive …………………………..than country ones. A. more careful B. more careless C. more carefully D. more carelessly Question 7. They offered him a place at the company but he............................................... A. pass down B. turned down C. go down D. closed down Question 8. This sports center is so small that it cannot …………………the demands of local residents. A. keep up with B. face up to C. deal with D. set up Question 9: A: Wow! You have a lot of stamp collections of cities in the world. B: ………………………………………. . Would you like to see them? A. My hobby is. B. It is right up my street. C. Many thanks. D. Are you kidding me? Question 10. Many people in the village have received medical treatment………..the disease after the earthquake. A. because of B. because C. due to D. both A& C Question 11. Five – sticky- rice cake is one of the………………………of the Thai minority. A. dishes B. foods C. specialties D. ingredients Question 12: Circle the correct option (A, B, C or D) that is closest in meaning to the underlined word. They spend all day sunbathing and playing volleyball on the beach. A. daily B. every day C. each day D. whole day D. whole day Question 13: Some people think that school put too much ………………on students nowadays. A. interest B. emotion C. pessure D. expectation Question 14: . Ms Mai advised them _____ in class. A. to not talk B. not to talk C. to talk not D. don’t talk E. Mục khác: Giups em với nha mng
Giúp mình giải 2 câu này với các bạn ơi
Giúp mk câu này vs, cảm ơn nhìu
Vẽ tự do. Không chép mạng. Có chữ kí.
Viết đoạn văn tầm 600 từ về 1 nội dung mà anh chị tâm đắc nhất trong tác phẩm Vợ nhặt của Kim Lân.
Loga.vn - Cộng Đồng Luyện Thi Trực Tuyến