45minutes=0,75 hour
\(\Rightarrow\)45 minutes we will have gone: 0,75x4= 3(km)
30minutes=0,5hour
\(\Rightarrow\)30 minutes we will have gone: 0,5x10=5(km)
\(\Rightarrow\)we will have gone 8 kms at one hour fifteen minutes
A man expected to travel from A to B at 40 kilometers per hour. However, when he had gotten a half of his route, he sped up and travelled at an average speed of 60 kilometers per hour. Therefore, he reached B 1 hour earlier than his plan. How long is AB in kilometers?
You have 15 blue marbles. Your friend Duong takes away 3 and gives you 2. You drop 8 but pick up 4. Hung takes 4 and gives 5. You take one from Duong and give it to Hung in exchange for 3 more. You give those 3 to Duong and she gives you a blue and a yellow. Phong comes and takes the blue marbles Duong gave you and gives you a green. You give the green to Hung in exchange for a blue marble. Phong then takes a blue marble from Duong, gives it to Hung for a yellow, and gives you the yellow for a blue marble. How many green marbles do you have?
You have 15 blue marbles. Your friend Duong takes away 3 and gives you 2. You drop 8 but pick up 4. Hung takes 4 and gives 5. You take one from Duong and give it to Hung in exchange for 3 more. You give those 3 to Duong and she gives you a blue and a yellow. Phong comes and takes the blue marbles Duong gave you and gives you a green. You give the green to Hung in exchange for a blue marble. Phong then takes a blue marble from Duong, gives it to Hung for a yellow, and gives you the yellow for a blue marble. How many green marbles do you have?
A person travel from A to B at a constant speed v = 4 km / h. After he travelling \(\frac{2}{3}\) of the distance, he speed up 25% velocities. It takes 28 minutes to go A to B. The length of AB is.....
Two people need to finish a work. The first person can finish the work by himself in \(\frac{2}{5}\)hours. At first, the first person does it alone and then 12 minutes later the second person join to work together. Two people work in \(\frac{1}{9}\) hours, then complete the work. How long does it take the second person to finish the work all by himself?
Alice is playing with words. At each tick of her grandfather’s clock she swaps two letters. What is the smallest number of clock ticks during which she can change WORDS to SWORD?(A) 3 (B) 4 (C) 6 (D) 7 (E) 8
This pinwheel star is formed by rotating a right-angled triangle
around one of its corners. What is the angle at each of the nine
tips that are marked with dots?
(A) 30◦
(B) 40◦
(C) 45◦
(D) 50◦
(E) 60◦
I have twelve paint tins each capable of holding twelve litres. Half of them are half
full. A third of them are a third full. The rest are one-sixth full. How many litres of
paint do I have in total?
(A) 48 (B) 50 (C) 52 (D) 54 (E) 56
Chọn đáp án đúng
11. They meet their friends and.................... some fun
A. take B. have C. do D. enjoy
15. Some students say they are ............ have no time for pastme
A. hurry B. busy C. full D. hard
17. THey aren't any good movies ................ at the moment
A. goiing on B. being on C. performing D. showing
18. Sorry I can't come but thanks............
A. any ways B. any way C. anyway D. in anyway
Chia V
1.He(be).................. in HN for a year and then he(go)................ abroad
2. You(be)...................... to HCM City?- Yes, I (go)............. there last summer.
Cho dạng của V
2. Two million people die of...................... in 1945 HUNGRY
11. Walking in the rain gives us lots of....................... PLEASE
13. The room will look brighter if there is a ................. on the wall PAINT
Bottle A contains 15% syrup. Bottle B contains 40% syrup. When these 2 bottles of syrup are mixed, the syrup content is 30% and the total volume is 600ml. How much syrup is in the bottle A at first?
Answer: ..........ml.
