Basic operations and concepts - math word problems - page 273 of 332
Number of problems found: 6633
- Acid Dilution Water Added
I have 500 ml of 31% acid and must dilute it to 5%. How many ml of water do I need to add? - The painter
To achieve the desired colour, a painter must mix green and yellow paint in a ratio of 4:7. If he has 28 litres of green paint, how many litres of yellow paint should he add? How many litres of mixed paint will he get in total? - Sick
Six seamstresses should make 60 shirts in five business days. After three days, two seamstresses were sick. How many days will the remaining seamstresses need to finish the contract? - Tank filling
A worker would fill the tank with one inlet in 36 minutes, the other in 45 minutes. How long will it take to fill the tank if the water flows through the first inlet for 9 minutes and then both simultaneously? - Two trucks
Two trucks left cities A and B against each other and met after an hour. The first car came to B 27 minutes later than the second car to A. Calculate the car speed if the distance between cities A and B is 90 km. - Road repair time
Ten workers managed to repair the road in 22 days. After four days, two more workers joined to speed up the work. How many days does it take to repair the road? - Alcohol preparation
We want to prepare 200 g of 64% alcohol. We have a sufficient amount of 80% and 45% alcohol. How many of which will we need? - Investment ratio
Three entrepreneurs decided to invest in a joint project in a ratio of 4:5:7. The largest deposit was € 3,430. How many euros did they invest together? - Banknotes
$ 1390 was collected. How much was in $20 notes, and how many in $50 notes in that order? How many solutions exist? - Workers
Ten workers must pave the road for 22 working days. After four days were spent speeding up work, two more workers were added. a) After how many work days do workers complete the paved road? b) How many working days does a total paved road take? - Acid
A barrel contains 79 litres of 60% acid. What percentage of acid remains when 4 litres are removed and replaced with the same amount of water? - Banker client probability
The banker deals, on average, with five clients a day. Find the probability that the number of clients (in one day) will be greater than 4. - Grade Percentage Better
There were 21 pupils in the class. The teacher gave grade 1 to 3 pupils, grade 2 to 5 pupils, grade 3 to 8 pupils, grade 4 to 4 pupils, and grade 5 to 1 pupil. What percentage of students received a grade better than 3? - Fifteen
Fifteen students had an average age of 12 years. When the class teacher came to see them, their average increased by exactly one year. How old was the teacher? - Dice Rolls for Sum
Stella rolls a standard six-sided die. How many times does she have to roll the die to be sure that the sum of the results will be at least 4? - Train colors
The locomotive pulls six wagons. Each of the wagons is either red or blue. The order of colors of individual wagons is the same from the front and back. How many such trains can you draw? - Football league
There are 16 teams in the football league. How many different sequences of results may occur at the end of the competition? - Four-digit numbers
The numbers 1,2,3,4,5 are given. Role: a) how many 4-digit numbers can we create if the digits cannot be repeated? b) how many generated numbers will not contain the digit 1? c) How many of the generated numbers will be divisible by 5? d) How many of the - Sugar - cuboid
Pablo received from his master a cuboid composed of identical sugar cubes, each weighing between 1000 and 2000. The Pejko eat sugar cubes in layers. On the first day, eat one layer from the front. On the second day, one layer is from the right, and on the - David number
Jane and David train in the addition of decimal numbers so that each of them will write a single number, and these two numbers will then be added up. The last example was 11.11. David's number also had the same number of digits before and after a point. J
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