Math practice for 13 year olds - page 329 of 428

Number of problems found: 8549

Algebrogram
Solve algebrogram: mama+anna=vari How many solutions are?
Apples and pears
Mom divided 24 apples and 15 pears among the children. Each child received the same number of apples and pears - the same number as their siblings. How many apples (j=?) and pears (h=?) were received for each child?
Cubes from beam
The edge of the cube-shaped dice is 3.5 cm long. How many of these cubes are made of an oak beam 3.5 m long and a square cross-section with a side 35 cm long?
Share price
The initial share price first fell by 2%, and then this new price rose by 20%. The final share price is CZK 2,400. Calculate the initial share price.
Trapezoid median
The median of the trapezoid p is 18.6 cm, and the base a = 29.8 cm. Calculate the size of the second base c.
Wheel revolutions
The circumference of the vehicle's front wheel is 1.44 m, and the circumference of the rear wheel is 2.56 m. How long did the vehicle travel when the front wheel made 560 more revolutions than the rear? For the unknown, choose the number of revolutions of
Diamond diagonal
The diamond has an area of 94.24 square meters and one diagonal of 7.6 cm. Calculate the length of the second diagonal.
Gold extraction
There are 1.2 per mille of gold in the rock. How many grams of gold will they get from 45 tons of raw material?
Tank dimensions
The block of goods has dimensions of 2.5 m, 4.2 m, and a height of 180 cm. It is filled to two-thirds of the volume. How many hectoliters of water are in it? How many m² of the tank is soaked with water?
Active substance
There are 5 ml of active substance in a 600 ml spray. How much is it per mille?
Circle waste
Calculate the percentage of waste when we cut out 4 of the largest possible circles from a square sheet with sides of 1 meter.
Coat price
The cost of the coat, 1500kc, was reduced by 20% and increased by 20% after a week. What is the price?
Collection weight
Tomáš brought the collection 20 percent less than Michal. Filip brought half of what Tomas did. Together, they brought 52.8 kg. How much did he bring?
Interest rate
At what annual interest rate would we get an interest of 60 euros on a deposit of € 6,000 for three months?
Two numbers
The sum of two numbers is 10,000, and one is four times larger than the other. What are two numbers?
Number average
The average of the two numbers is 74. One of these numbers is a) 62.5 b) 102 specify the second number
Break percentage
Students have classes from 8:00 to 12:30. One 15-minute break and three 10-minute breaks between lessons. What percentage of teaching is breaking?
Percents
How many percents is 900 greater than the number 750?
Above 100%
Find 340 percent of the numbers 45 and 55.
Atomic diameter
The diameter of the atomic nucleus is 10 to -12cm. How many atoms would fit on a 1 mm line if they could be arranged close together?

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