Basic operations and concepts - math word problems - page 278 of 321
Number of problems found: 6401
- Alaska vs Montana
Alaska is the largest state in the United States and has a surface area of approximately 588,000 square miles. Montana has a surface area of approximately 25% of the surface area of Alaska. What is the approximate surface area of Montana? - Average 66794
Look for three numbers with an average of 2000. The middle number is 2000 - Ace
We pulled out one card from a complete set of playing cards (32 cards). What is the probability of pulling the ace? - Guests
How many ways can 8 guests sit down on 10 seats standing in a row? - Apple collecting
Luke, Peter, and Tibor compared how many kilograms of apples they had collected. They found that the arithmetic mean of what Luke and Peter collected was 10 kg larger than Tibor's contribution, and the arithmetic means of what Luke and Tibor collected was - Calculate 38563
Six equally powerful machines produce 870 parts in 14 hours. Calculate in how many hours 870 parts will have four such machines. - Carpenter 36293
The carpenter did the work in 3 2/5 hours. What part of the work did he do in an hour? - Twenty-seven 3476
Twenty-seven workers did the work in 12 days. In how many days would nine workers do the same job? - Electrons 3363
How many electrons must be together to put a charge of -1C together? - Arithmetic 65324
Martin has an arithmetic average of 2.8 out of five history grades. If he only gets one from now, how many ones would he have to get at least so that the arithmetic mean of his history grades is less than 2? - Supply 3464
Hay stock is enough for four horses for 60 days. How long would this supply last for ten horses? - Temporary workers
Three temporary workers work in the warehouse and unload the goods in 9 hours. At what time would five temporary workers unload the same products? - Pump
What power does a pump output to move 1060 hl of water to a height of 43 m for 8 hours? - Tractors
Six tractors plowed the field for eight days. After two days, two tractors broke down. How many days were prolonged work in the field? - Painting
Joseph and Fero painted the bench for four hours. If four friends helped him, how many hours would it take him to work? - Radioactive decay
A type of radioactive element has a mass of 1.125 grams. Upon analysis, he is found to be 405 years old. If this radioactive element decays by half every 45 years, find how many grams of this radioactive element there were 405 years ago. - Revitalization 39191
Workers are building a new sidewalk while revitalizing the housing estate. Six workers will do the work in 12 days, but this is a problem because the sidewalk must be completed in 10 days to complete the work on time. How many workers must be hired to com - Triangle from sticks
Bob the boulder has many sticks of lengths 3.5 and 7. He wants to form triangles, each of whose edges consists of exactly one stick. How many non-congruent triangles can be formed with the sticks? - Probability 7812
We have 20 balls in the bag, numbered from 1 to 20. Determine the spring probability that I will pull a ball with a steam number and less than 13 from the bag. - Notation 7014
There is no 0 in the decimal notation in natural numbers; there are even numbers or odd numbers, each at least once. Find the number of all k-digit natural numbers.
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