Math practice for 13 year olds - page 129 of 428
Number of problems found: 8555
- Lenka Julia age
Lenka is 12 years old, and her sister Julia is x years old. My mother is 22 years older than Julia, and at the same time, Lenka is three times younger than her mother. How old is Julia? - Annual deposit savings
A person deposits 5,000 euros into a bank account at the beginning of each year for 10 years. He does not make any other deposits or withdrawals from the account. Determine the total amount saved at 8% compounded annually when interest is compounded annua - Library
They packed books in the library. They used 45 cm of wrapping paper per book. Wrapping papers are sold in rolls of 3 meters. How many such roles do they need to wrap 20 books? - Colored balls
There are colored balls in the bag. One-third of them are blue, one-sixth are green, five-twelfths are yellow, and the remaining ten balls are red. How many yellow balls are in the bag? - Ski price increase
How many cross-country skis have risen in price if they increased the original price of € 75 to € 90 - Wall paper
Suppose you want to paper your walls. Wallpapers are available in 4 different backgrounds colors with seven different designs of 5 different colors. In how many ways can you select your wallpaper? - Exchange office
We get € 1.2 for one pound in the exchange office. For 1 € we get 4 Polish zlotys. Michael found 300 zlotys at home and wanted to turn them into pounds. How many pounds will he get for them? - Weekly student selection
There are 16 students in the class. If the teacher wants to choose two students who will be weekly, how many options does she have? - Determine 6
Determine the least common denominator 3/4 and -5/6 - Male players
In the game, 15 players played, and there were six males. What percent of males played in the game? - Conductor resistance
Calculate the resistance value of the electrical conductor if it is connected to a voltage of 12 V and an electric current of 0.3 A passes through it. - Iron electrical resistance
The iron is connected to a 230 V power supply with a current of 5000 mA. Calculate the electrical resistance of the iron. - Plan road scale
A 3.5 cm-long line shows the 350 m-long road on the plan. What is the project's scale? - Box cube paper
The open box has the shape of a cube. We used 80 dm² of paper to glue on it. What is the volume of this box? - SMS message ratio
Jana, Petra, and Andrea sent an SMS to Superstar. The number of messages they sent was in the ratio 4:3:2, with Andrea sending 35 fewer text messages than Jan and Peter combined. How many text messages did all 3 girls send together? - Loader pressure change
How does the pressure value change when we load a loader with the same weight as the car? - Venus volume surface
Calculate the volume and surface of the planet Venus if its circumference is 12,000 km. - Truck rail pressure
How much pressure on the rails will cause an empty truck weighing 20 tons if the contact area of all wheels and rails is 16 square centimeters? - Allan 2
Allan wants to buy a shirt regularly priced at PHP 265. The shirt Is on sale for 15% of the regular price. Which equation can be used to determine the sale price of the shirt? - Perimeter - triangle
Construct triangle ABC when we know a + b + c (perimeter), height to side c, and angle gamma.
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