bài làm
The number of seconds lost in his watch's content is 60 times 4 times 60= 14400 Seconds
Question 3. Two neon lights are turned on at the same time. One blinks every 4 seconds and the other blinks every 6 seconds. Answer the following questions, give your answer only.
a) How long will it take them to blink simultaneously for the first time after they are turned on? (simultaneously: at the same time)
b) How many times will they blink simultaneously in the first 70 seconds after they are turned on?
Mary calculates the sum of the digit that she sees on her clock (example : if the clock shows 16:35 then she get 15).what is the biggest sum she can get if the clock is a 24 hour clock?
191 is the number that stays the same when read backwards as when read forwards
How many 4 - digit number have this property?
Each morning, Catherine walks to school. At one- fourth of the way she passes the machine, a tractor station; at one-third of the way, the railroad station. At the machine and tractor station its clock shows 7 : 30, and at the railroad station its clock shows 7:35, When does she leave her house, when does she reach school ?
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?
A is playing the game. He flips the coin, and if it lands on heads, he gets 1 point. If it lands on tails, he gets 2 points. A does this thing many times. THE GOAL IS TO GET 14012010 POINTS. Note that the coin can land on side, but it HAPPENS ONCE 6000 FLIPS. But A can let the coin LANDS ON SIDE ONES EVERY 2010 FLIPS. If this happens, he will get 5 points.What is the maximum number of flips that A need to achieve the goal? ( About 3/4 of the time the coin lands on tails. )
BONUS:IF A TAKES 10 SECONDS FOR A FLIP, HOW MUCH TIME HE NEED TO ACHIEVE HIS GOAL?
Quang ang Binh run around a lake. Quang is faster than Binh so he passes Binh at first. Then 35 minuters, Quang meets Binh at the first time. Knowing Binh run around with 1 minute and 45 seconds. How many time does Quang run around the lake ?
0.6 hour = minutes.
Question 2:
51 hours = days
(Write your answer by decimal in the simplest form)
Question 3:
12 hours 24 minutes 2 = hours.
(Write your answer by decimal in the simplest form)
Question 4:
5 minutes 27 seconds: 3 = seconds.
Question 5:
How far will Mary travel if she rides her motorbike for 24 minutes at a speed of 75 miles/hour?
Answer: miles.
Question 6:
How fast is Anna going if she runs 8 miles in the park in only 2 hours?
Answer: mile/hour.
Question 7:
How fast is Jack going if the train he is on travels 20 miles in just 6 minutes?
Answer: miles/hour.
Question 8:
Yesterday Peter roller skated for 2.5 hours at a speed of 6 km/h. How many kilometers did he skate?
Answer: km.
Question 9:
The distance between 2 trees is 300 meters. It will take a bird 30 seconds to fly between these 2 trees. How fast is the bird in kilometer per hour?
Answer: km/h.
Question 10:
The area of a rectangle ABCD is . Given a random point E inside of ABCD.Find the total area of triangles AED and BEC.
Answer:
Question 1:
51 hours = days
(Write your answer by decimal in the simplest form)
Question 2:
5 minutes 27 seconds: 3 = seconds.
Question 3:
12 hours 24 minutes 2 = hours.
(Write your answer by decimal in the simplest form)
Question 4:
0.6 hour = minutes.
Question 5:
How fast is Anna going if she runs 8 miles in the park in only 2 hours?
Answer: mile/hour.
Question 6:
Yesterday Peter roller skated for 2.5 hours at a speed of 6 km/h. How many kilometers did he skate?
Answer: km.
Question 7:
How fast is Jack going if the train he is on travels 20 miles in just 6 minutes?
Answer: miles/hour.
Question 8:
How far will Mary travel if she rides her motorbike for 24 minutes at a speed of 75 miles/hour?
Answer: miles.
Question 9:
The area of a rectangle ABCD is . Given a random point E inside of ABCD.Find the total area of triangles AED and BEC.
Answer:
Question 10:
The distance between 2 trees is 300 meters. It will take a bird 30 seconds to fly between these 2 trees. How fast is the bird in kilometer per hour?
Answer: km/h.
