At 4pm, Rui Feng, Khai, and Ethan are at the starting point of a 2.4 km circular path. Rui Feng takes 126 second, Khai takes 154 seconds, and Ethan takes 198 seconds respectively to complete one round around the path. When will they next meet again?
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A grandfather clock takes 6 seconds to chime 4 times at 4 o`clock. How many seconds will the grandfather clock take to chime 6 time at o`clock?
Một chiếc đồng hồ quả lắc mất 6 giây để đổ chuông 4 lần vào lúc 4 giờ
đồng hồ.Đồng hồ ông nội sẽ mất bao nhiêu giây?
bài làm
The number of seconds lost in his watch's content is 60 times 4 times 60= 14400 Seconds
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Tom and Jelly embarked on a moving escalator to the second floor of a shopping mall. Tom walked up the escalator at a speed of 2 steps every second. At the same time, Jelly walked up the same escalator at a speed of 3 steps every 2 seconds. Tom arrived at the second floor in 25 seconds. It took Jelly 30 seconds to reach same floors. How many steps had the escalator when it stationary ?
Like all other planets in the solar system, Earth orbits …………the Sun. And it does do at some serious speed- around 30 kilometers per second, in fact! It takes 365 days (one year) for Earth to complete one full orbit.
A. around B. along C. outside D. on
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Like all other planets in the solar system, Earth orbits …………the Sun. And it does do at some serious speed- around 30 kilometers per second, in fact! It takes 365 days (one year) for Earth to complete one full orbit. A. around B. along C. outside D. on
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Like all other planets in the solar system, Earth orbits …………the Sun. And it does do at some serious speed- around 30 kilometers per second, in fact! It takes 365 days (one year) for Earth to complete one full orbit.
A. around B. along C. outside D. on
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It takes 5 minutes to fry a pancake. One side of the pancake takes 3 minutes to fry and the other side takes only 2 minutes. Two pancakes can be placed on the frying pan at a time. What is the shortest time to fry all five pancakes???
Three signal lights were set to flash every certain specified time . The first light flashes every 12 second , the second flashes every 30 seconds and the third one every 66 seconds . The signal lights flash simultaneously at 8:30 a.m . At what time will the signal lights next flash together
12=3.2^2
30=3.2.5
66=11.2.3
BCNN(12,30,66)=3.2^2.11.5=660(sec)
660sec=11min
8:30min+11min=8:41min
=>The signal lights will flash together at 8:41
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Charlie and Lily go on a 24 km run. They both usually run at 9 km/h. If Charlie runs at 2/3 his usual running speed, and Lily runs at 4/3 times her usual speed, how many more hours does it take Charlie to complete the run than it takes Lily to complete the run?
Charlie and Lily go on a 24 km run. They both usually run at 9 km/h. If Charlie runs at 2/3 his usual running speed, and Lily runs at 4/3 times her usual speed, how many more hours does it take Charlie to complete the run than it takes Lily to complete the run?
Read the passage below and decide whether the statements are TRUE or FALSE?We are all around computers. Computers play an important play in our day to day lives, like we are very much dependent them for doing many things including giving users the ability to quickly and easily store and process data. Since the invention of computer they have evolved in terms of increased computing power and decreased size. Computers are used in many sectors like Education, Health and Medicine, Financial Institut...
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Read the passage below and decide whether the statements are TRUE or FALSE?
We are all around computers. Computers play an important play in our day to day lives, like we are very much dependent them for doing many things including giving users the ability to quickly and easily store and process data. Since the invention of computer they have evolved in terms of increased computing power and decreased size. Computers are used in many sectors like Education, Health and Medicine, Financial Institutions, Transport System, E-Commerce, Defence etc.
Computers connect us to the world of unknown. They help us gathering knowledge and huge information from the internet and storing it. Computers are multitasking and accurate enough to be used almost anywhere and everywhere including banks. Computer provide security from destructive forces and from unwanted action from unauthorized users like cyber attack or access attack.
Now computer is not just a calculating device, it has become much more than that. One of the main advantages of computer is its incredible speed, which helps human to complete their task in few seconds. All the operations can be performed very fast just because of its speed else wise it takes a long time to perform the task.
Question: Computers are not speedy enough to help human to complete their task in few seconds.
A. True
B. False
Đáp án: B
Giải thích: Dựa vào câu: “One of the main advantages of computer is its incredible speed, which helps human to complete their task in few seconds.”.
Dịch: Một trong những lợi ích của máy tính là tốc độ đáng kinh ngạc, cái mà giúp con người hoàn thành công việc trong vòng vài giây.
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