Math practice for 13 year olds - page 287 of 428

Number of problems found: 8551

Cyclist time
A car traveling at 75 km/h will drive from place A to place B in 3/4 hours. How long does it take for a cyclist to get there at a speed of 25 km/h?
Sugar Consumption Reduction Ratio
The Novak family had an annual sugar consumption of 68.4 kg and decided to reduce it by 5:8 the following year. How much sugar can the Novak family consume in the next year?
Line segment
The 4 cm long line segment is enlarged in the ratio of 5/2. How many centimeters will the new line segment be long?
Electric energy
There are 875 identical light bulbs in the sports hall lighting for 2 hours. How long does the same amount of electricity consume 100 such bulbs?
Finding Original Number
If we reduce the number x by 30%, we get 140. What is x?
Sugar content
Diabetes contains 13% sugar. From what amount of diabetes do we get 15q of sugar? How much sugar do we get from 15q of diabetes?
Members Increase Percentage
Three new members have been added to the section. The number of members increased by 2%. How many members does the section now have?
Cyclist meeting
Trenčín is 120 km from Bratislava. The average speed of a cyclist traveling from Trenčín towards Bratislava is 20 km/h. Calculate the average speed of the passenger car that left Bratislava compared to the cyclist if the cyclist and the passenger car left
Borrowing Rate of Berries
At what rate did the sparrow borrow 1,200 grape berries from the thrush when it returned 1,392 berries?
Distance Between Circle Centers
Two circles with straight radii of 58 mm intersect at two points. Their common string is 80 mm long. What is the distance of the centers of these circles?
Cake Icing Area Left
We baked a cake with a diameter of 26 cm. We watered it with icing. The dog licked 45% of the icing. What area did we have left?
Drawing Rectangle with Area
The picture shows a square net in which the side of one square is 1 cm long. Draw a rectangle with an area of 18 squares with a circumference of 22 cm.
SOŠ 2
The secondary vocational school keeps statistics on the number of students who applied to the school. In 2014 and 2016, a total of 1435 students applied to the school. In 2015, 70 more students applied than in 2014, and in 2016, even 1.5 times more studen
Commission
Daniel works at a nearby electronics store. He makes a commission of 15% percent on everything he sells. If he sells a laptop for 293.00$, how much money does Daniel make in commission?
Three-euro stamps
The boy bought stamps worth € 2 and € 3, a total of € 65. Two euros was five times more than three euros. How many marks were there?
Altitude difference
Between the resorts is 15 km, and the climb is 13 permille. What is the height difference?
Complementary angles 2
Two complementary angles are (x+4) and (2x - 7). Find the value of x.
Saving for Phone Case
Kamil saved up to buy a new phone case, which cost CZK 390. He only put ten and twenty crowns in the cash box. After two months of investigation, he had 25 coins in his treasury. When he calculated the total value of all the coins, he found out that he st
Alcohol in Bloodstream
If a person has 6 kg of blood, how much alcohol does he have in his blood if they measured 3 per mille?
Paint for Hexagonal Pool
How much paint do we need to paint a pool in the shape of a 6-sided prism? The base edge measures 21 dm, the corresponding height is 1.8 m, and the pool height is 150 cm. We need 0.21 kg of paint per 1 m².

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