Time + reason - practice problems - page 16 of 19
Number of problems found: 379
- Friends
Five mates traveled, and the journey lasted 195 minutes. How long would travel only one of them?
- Television
When we add the difference between the numbers 1704 and 654 and the difference between numbers 14920 and 14042, we get the year in which television was invented. How many years have people known TV?
- Clock
What distance will pass the end of an 8 cm long hour hand for 15 minutes?
- Borrowed book
Jane must, as soon as possible, return a borrowed book. She figured that reading 15 pages a day return the book in time. Then she read 18 pages a day and then returned the book one day before. How many pages should a book have?
- Scouts
Three scouts went on a three-day trip. On the second day went 4 km more than the first day. The third day went two times less than the first day. They went along 54 km. How many kilometers went every day together?
- Clocks
What distance will describe the tip of a minute hand 6 cm long for 20 minutes when we know the starting position with finally enclosed hands at each other at 120°?
- Jane and Miro
Jane's brother Miro is 42 years old. He is three times as old as Jane when Miro was for as many years as there are now Jane. How old is Jane?
- Floating floor
In the new building, a floating floor worker is considered in each room. Thirty minutes lay 9 m² of the floor. How long did three workers lay the floor in four rooms with a total area of 90 m²?
- Miraculous tree
The miraculous tree grows so fast that the first day increases its height by half the total height of the second day by the third, the third day by a quarter, etc. How many times will it increase its height after 6 days?
- Forest ranger
Forest ranger watching from the hide deers. At one time point, he can see six deers. How many maximum deers can be seen by three rangers simultaneously?
- Holiday SMS
Kucera and Malek start the holiday together. They agreed that they would send an SMS if they were 100 km apart. Kucera traveling at 60 km/h., Malek 90 km/h. They started at 14 hours PM. At what time do they send a message?
- Pedestrian and cyclist
A Pedestrian out with a speed of 4 km/hour from the city center and after 1 hour and 10 minutes came after him cyclist at a speed of 18 km/h. In how many minutes does he catch up with the pedestrian?
- Father and son
The father is three times older than his son. Twelve years ago, the father was nine times more senior than the son. How old are father and son?
- A family
A family of four pays for garbage collection per the year 1800 CZK. How many CZK (Czech crowns) a year does the waste company get from the house where live 93 people live?
- Two workers
Two workers together execute some work in 10 days. The first worker would have done it himself in 20 days. How many days would they have done himself a second worker?
- 5 pumps
Five pumps to pump 3 hours 1600 hl of water. How long pumped the same amount of water from four pumps?
- Painters
Fifteen painters painted the fence for 280 minutes. For how many minutes, paint half of this fence with 12 painters?
- Cooks
Four cooks cleaned 5 kg of potatoes for 10 minutes. How many cooks would have to work cleaning 9 kg of potatoes for 12 minutes?
- Pair
The pair have been together 57 years. He has two times as she was when he was equal as she has today. How old are they?
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