Algebra - math word problems - page 282 of 302
Number of problems found: 6040
- Acids
70% acid is made from the same acid of two different concentrations. The amount of weaker acid to the stronger acid is in ratio 2:1. What was the concentration of the weaker acid if the stronger had 91% concentration? - Ways
There are five roads from village A to village B, two roads from village B to village C, and only one road directly from village A to village C. In how many different ways can you get there: A) from village A to village C via village B? B) anyway from vil - Red cubes
There are 15 white and several red cubes in the box. The probability of accidentally pulling out a white cube is 20%. How many red cubes are in the box? - Dilute 8392
I have 500ml of 31% acid and must dilute it to 5%. How many ml of water do I need to add? - 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?
- 1st drug
The first drug pack has an active ingredient ratio of L1: L2 = 2:1 The second drug pack has a ratio of active ingredients L1: L2 = 1:3 Which ratio do we have to mix the two packages so that the ratio of substances L1: L2 = 1:2? - Pumps
Four identical pumps fill the tank in 40 hours. How many pumps would we have to use if we wanted to save 8 hours?
- Cows
Twenty cows have food for 60 days. We reduce the dose to two-thirds for 18 cows. How many days will it feed? - Machines 2
Two machines produce 2,000 products in 50 hours. How many machines do you need to buy to make 15,000 products in 30 hours? - 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? - Resistance 80351
We connected two resistors in parallel in the circuit, with the first having three times the resistance of the second. The voltage between the terminals of each resistor is 6 V. Calculate the current through each branch when the resulting resistance of bo - A beauty
A beauty supply company has 53 liters of 5% hydrogen peroxide solution on hand and a nearly limitless amount of a solution containing 35% hydrogen peroxide. How many liters of the 35% hydrogen peroxide solution should the company add to the 5% hydrogen pe - Corresponding 60311
The drink was mixed from one hundred percent juice and water in a ratio of 1.5 liters of juice to 2.5 liters of water. Calculate how many liters of this drink will be created by mixing 1 liter of water and juice in the corresponding ratio. Calculate how m - Solution 3092
How many liters of 80% alcohol need to be mixed with 4 liters of 40% alcohol to get 70% alcohol? How many liters of 70% solution do we get? - Gardeners 2818
Five equally skilled gardeners mowed one-third of the park in 12 hours. How many gardeners need to be called to mow the rest of the park in 8 hours?
- Diggers
Eight diggers will do the job in 85 hours. After 21 hours, three diggers had to leave. How many hours will the work be done? - Permutations
How many 4-digit numbers can be composed of numbers 1,2,3,4,5,6,7 if: a, the digits must not be repeated in the number b, the number should be divisible by five, and the numbers must not be repeated c, digits can be repeated - Dices throws
What is the probability that the two throws of the dice: a) Six falls even once b) Six will fall at least once - Population 37561
The population increased from 29,000 to 31,500 in 5 years. Calculate the average annual population growth in percents. - Exchange € 100
Find out how many ways you can exchange € 100 if you have an unlimited number of 50, 20, 10, and 5 euro banknotes. Use a method other than listing all options systematically.
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