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. Câu hỏi :
Hỏi đứa trẻ lớn nhất hơn đứa trẻ nhỏ nhất bao nhiêu tuổi .
25 - 17 = 8 ( tuổi )
đ/s : 8 tuổi
Có lẽ là 17.
Lý do :
Thấy : \(22=2.11\) \(\notin P\)
\(20=2^2.5\notin P\)
\(17\in P\)
\(25=5^2\notin P\)
Do đó ....
2: Ước của 120 là:
{1;2;3;4;5;6;8;10;12;15;20;24;30;40;60;120}
9: x+ (1+2+3+4+...+100) = 5750
x + 5050= 5750
x = 5750 - 5050 = 700
6. Chữ số thứ 215 là 1285
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B The police are keeping a ......record...............of all cars which entered the area.
C It's difficult for anyone with a criminal...........record........ to get a job.
2. A With one blow he.........drove ............ the nail into the plank.
B Failure......drove............... him to such despair that he could hardly get over.
C The man.......drove..... the van up to the front door of the warehouse.
3. A Her family planned to....hammered...............her at the Christmas debutante all in New York.
B. She wants to.........hammered............ as a pleasant young woman.
C. He gave Brian a......hammered............... with the understanding that he would appreciate it until a later date.
4. A As we round the bend, the first few houses came into......view..............
B There is a widespread........view............. that too much sugar is bad for you.
C The prize-winning sculpture is on..........view........... at the National Gallery this week.
5. A The team did so ..........badly........... that they hardly reached the quarter-finals.
B Some of our trees were..........badly........... damaged in the storm.
C The roof has been leaking for some time and is...........badly.......... in need of repair.
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