Basic operations and concepts - math word problems - page 266 of 319
Number of problems found: 6371
- Probability 2386
We throw a die seven times. What is the probability that: a) the first, second, and third times fall six and not in all the others, b) 5 does not fall four times in a row, and yes, in the last 3 hours? - Three numbers
We have three different non-zero digits. We will create all three-digit numbers from them and use all three figures in each. We add all the made numbers and get the sum of 1554. What were the numbers? - Determine 81783
Determine the scale of the plan if the actual length of 51m is shown on the plan by a segment of length 3cm. - Interest 81773
How much will the deposit grow at an interest rate of 10% p.d. a. for 72 days by €6? - Resistance 62104
The iron is connected to a 230 V power supply with a current of 5000 mA. Calculate the electrical resistance of the iron. - Eighteen 31561
Eighteen nozzles fill the pool in 12 and a half hours. How long does it take for the pool to fill 15 nozzles? - Atmosphere 14493
What allows a person to walk the Earth: a) atmosphere b) Earth response c) feet d) rolling friction
- Boys and girls
There are 20 boys and ten girls in the class. How many different dance pairs can we make of them? - Water reservoir
The reservoir shape of a cylinder has a diameter of 8 m and a height of 2.8 m. The device indicates that the reservoir contains 800 hectoliters of water. Calculate how much % of the volume is used. - X-ray intensity
The intensity of X-ray radiation is reduced by half when passing through a 13.5 mm thick lead layer. Determine the thickness of the lead plate that will reduce the radiation intensity to one tenth of the original value. If we know that the intensity decre - Reading
If I read 15 pages a day, I will read the whole book in 18 days. How long will it take to read a book if I only read nine pages every day? - Ditch
The excavator dug 40% of the excavation in 2 hours and 20 minutes. How long does it take him to dig the whole ditch? - School trip
On a school trip, 17 of the 28 children bought ice cream or chocolate in a candy store. Twelve children bought chocolate, and nine children bought ice cream. How many children bought ice cream and chocolate? How many children did not buy ice cream? How ma - Clogging
How much distilled water must the pharmacist add to 30g of a 30% hydrogen peroxide solution to obtain a 3% solution for clogging? - Mushrooms
Fresh mushrooms contain 88% water and dried 14% water. How many kilograms of fresh mushrooms should be collected to get 3 kg of dried?
- Solutions, mixtures
How many liters of 70% solution must we add to 5 liters of 30% solution to give us a 60% solution? - Greenhouses
Two workers would complete the installation of greenhouses for 54 hours. For how many hours does the installation have nine workers? - Tractors
Six tractors started plowing the field, and work together took 12 days. Agronomist hesitates to: A) after two days, withdraw two tractors or B) after three days, withdraw three tractors. Help him which of these two cases will be plowing done sooner. - Pure gold
How much pure gold is in a 15-gram ring made of 14-carat gold? Round the result to the nearest tenth of a gram. - Hat and scarf
Katy knitted a scarf four times faster than a hat. Knitting together lasted 15 days. How much did she knit a hat?
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