Algebra - math word problems - page 288 of 312
Number of problems found: 6224
- Meadow
On the meadow, there are horses, cows, and sheep grazing together with less than 200. If cows were 45 times more, horses 60 times more, and sheep 35 times more than there are now, their numbers would equal. How many horses, cows, and sheep are in the mead - Five-digit number divisibility
How many different five-digit numbers with different digits can be made from the digits 0, 2, 4, 6, 7, 8, and 9? How many of them are divisible by 4? How many of them are divisible by 10? How many of them are even? - We roll
We roll two dice A. - what is the probability that the sum of the falling numbers is at most 4 B. - is at least 10 C. - is divisible by 5? - Fall sum or same
Find the probability that if you roll two dice, the sum of 10 will fall, or the same number will fall on both dice. - White Blue Balls Probability
There are eight white balls and several blue balls in the pocket. The probability of pulling out the white ball is 2/3. How many blue balls are in your bag? - Subsets
How many 19 element subsets can be made from the 26 element set? - Class - boys and girls
In the class are 60% boys and 40% girls. Long hair has 10% boys and 80% girls. a) What is the probability that a randomly chosen person has long hair? b) The selected person has long hair. What is the probability that it is a girl? - Alcohol
6 l 48% alcohol, how much must we add 52% alcohol to give 50% alcohol? - Rescuing people
Ultron from the Avengers film trapped on a ship 1 000 miles from the mainland 3 600 innocent people. Iron Man would rescue them one by one in an hour and 25 minutes, Ant-Man would manage it in 43 minutes and 20 seconds. Both heroes, however, joined forces - X-ray intensity
The intensity of X-ray radiation is halved 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 its original value, given that the intensity decreases exponenti - Condensation
How many litres of water must be evaporated from 400 kg of a 10% soda solution to obtain a 16% solution? - Saving problem
We want to save €25,000. We deposit €3,000 annually, and the interest is 4.4% (interest tax is 19%). How many years do we have to save? - Seawater salt evaporation
Seawater contains 3.4% salt. How much salt do we get by evaporating 25 kg of seawater, and how much water evaporates? - Workshop order days
In the first workshop, there are 3 workers; in the second workshop, 2 work equally efficiently. They worked on the order together, and for the last 2 days, only workers from the first workshop. If only the first workshop were working, the order would be c - Calculate: 2
Calculate: 1. Write the given sets as intervals, represent graphically: {x ∈ R; 2< x ≤ 5} = {x ∈ R; 3 ≥ x} = {x ∈ R+; x < 4} = {x ∈ R; x < 4 ∧ x ≥ -1} = 2. List all elements of the following sets, write into set brackets: A = { x Є N; x ≤ 5 } A = B - 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? - Mixture of nuts
Alice bought a mixture of nuts containing cashew nuts, hazelnuts, and peanuts in a ratio of 1:2:3. If the peanuts weigh 90 g, calculate the weight in grams of the whole mixture. - 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? - 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?
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