Math practice for 13 year olds - page 327 of 414
Number of problems found: 8279
- Cylinder:
Cylinder: calculate the height of a 3-liter cylindrical pot with a diameter of 10 cm. - Gingerbread sharing
Johnny and Mary ate 36 gingerbreads together. Johnny ate 14 more gingerbread. How many gingerbreads did Mary eat? How much did Johnny eat? - Money distribution
Adam, Boris, and Cyril have 21 CZK in total. Adam and Boris together have 11 CZK, and Boris and Cyril together have 13 CZK. How much does each of them have? - Playing match
Romania played a match against Canada. Canada won the duel by six goals. They scored a total of ten goals in the game. Find the number of goals scored by Romania. - Tournament goals Italy, the Netherlands, and Spain scored 67 goals in the tournament. The Netherlands scored two more goals than Italy, and Spain scored one goal less than Italy. Determine the number of goals.
- Book sales
The Harry Potter book was released in the second quarter, and 6,000 copies were sold in this quarter. In the third quarter, it sold 8% more and in the fourth quarter it sold 15% more than in the third quarter. How many Harry Potter books have been sold by - Percentage calculation
What is 15% of 30% of 600? - Circle radius
Calculate the circle's radius if the circumference and area are in a 2:5 ratio. - Switzerland - summerjob
Susan and Hannah used to work in a cherry orchard to earn money for a sightseeing trip to Switzerland. They picked 15 trees every day and harvested the entire orchard in 10 days. How long would it take them to harvest the entire orchard if they picked 20 - TV original price
The TV cost € 420 after a 9% discount. How much did he cost before the discount? - Cube diagonals
A cube has an edge length of 5 cm. Draw its different diagonals. - Proportion
Write the following proportion: Eight is to 64 as to 2 is to x - Numbers
a/ I think of a number. If I add 6 to it three times, I get it five times. Determine this number. b/ I think of a number. If I add 8 to its six times, I get a number that is 10 less than its fifteen times. c/ I think of a number that, when increased by 6, - Broken tree
The tree is broken at 4 meters above the ground. The top of the tree touches the ground at a distance of 5 meters from the trunk. Calculate the original height of the tree. - Dice options
We roll three dice. Write down all the feast options. - Ant
An ant crawls on the coordinate system always parallel to the coordinate axes. Yesterday it started its journey in the point with coordinates 0. It went 20 squares along the x-axis, made a left turn and went again 20 squares. Again it made a left turn and - SMS time
Smith and Wyatt are leaving from a joint vacation. They agreed that when they were 100 km apart, they would text each other. Smith drives at 60 km/h and Wyatt at 90 km/h. They left at 2:00 PM (14:00). What time do they text each other? - Parallelogram diagonals
One side of the parallelogram is 5 cm. Can it have 3 cm and 6 cm diagonals? - Percentage calculations
Calculate to two decimal places. What percentage is: a / 15min from 4 h b / 35 cm² of 12.5 dm² c / 2 dm² of 400 cm² d / 0.2 l of 2.2 l - Equation with x
Solve the following equation: 2x- (8x + 1) - (x + 2) / 5 = 9
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