Examples of equations for practice for 13 year olds - page 100 of 105
Number of problems found: 2087
- Moving
Vojta left the house at three o'clock at 4 km/h. After half an hour later went from the same place Filip by bicycle at speed 18 km/h. How long take Tilip to catch up with Vojta, and how far from the house? - Salary
Mr. Johnson's had a monthly salary of 955 USD since the beginning of the year. From which month was his salary increased by 52 USD, when in the year he earned 11824 USD (enter as a number from 1 to 12)? - Saving
Gejza save € 1470 to buy a car. Yet it lacks save 45% of the car price. How much is the car? - Rising price
The book first becomes more expensive by 5 euros. The new price was later increased by 28% after the second price increase book cost 30 euros. What was the original price of the book?
- Addends
Number 681 divided into the two addends that the first was 9 greater than 60% of the second. Determine these addends. - Fertilizer
Mr. Gherkin uses for fertilization 10% solution of fertilizer. 5 liters of it still left. How much water must be added to the solution to make only the 7% solution? - Workers
Two workers, A and B, will be done work together for 15 days. They worked together for 13.5 days. Then A worker became ill, and worker B finished the job alone for 7.5 days. If every worker was working alone, how many days took the whole work for workers - Suit
The suit cost 119 euros. How much cost the pants if it is 50% cheaper than the jacket? - Madams
During the spring cleaning, ladies were going to wash the windows. Mother takes to wash all the windows 5 hours, the grandmother takes 3 times longer, and Paula washes all windows in 2 hours. How many hours will you spend washing the windows of this "wome
- Car
The car goes from point A to point B at speed 86 km/h and back 53 km/h. If it goes there and back at speed 67 km/h trip would take 10 minutes shorter. What is the distance between points A and B? - Train
A passenger train traveled for 2 hours 74 km. 3.1 hours after its departure started fast train and caught it on 186 km. How many km/h is different from its average speed? - Quadrant II
Calculate the radius of the quadrant, which area is equal to the area of the circle with radius r = 15 cm. - Homework
Together, the mother and Kate weigh 24.5 kg more than the father. The father weighs 7.6 kg more than the mother. The father weighs 44.8 kg more than Kate. Determine the weights of the father, mother, and Kate. - Count of roots
How many solutions have equation x. y = 7757 with two unknowns on the set of natural numbers?
- Homework - jumps
Sasha jumped 131 cm Peter 4 cm more than Jirka. Jirka 6 cm less than Misha. Misha 7 cm less than Filip, and Filip is half as much as Sasha and Petr together. How far does each jump? - IS trapezoid
Isosceles trapezoid arm measured 35 cm. Height is 30 cm, and the middle segment is 65 cm. Find the length of its bases. - Bakery
How heavy must prepare bread at a bakery if a bread loses 18% of water during baking and after baking must have 1.7 kg? (Calculate to the nearest gram) - Tank
In the middle of a cylindrical tank with a bottom diameter of 251 cm is a standing rod that is 13 cm above the water surface. If we bank the rod, its end reaches the water's surface just by the tank wall. How deep is the tank? - Pure quadratic equation
Solve pure quadratic equation -7x² +4 = 0.
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