Math practice for 13 year olds - page 327 of 413
Number of problems found: 8260
- 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 - Chord distance
There is a 12 cm long chord in a circle with a radius of 10 cm. Calculate the distance of the chord from the center of the circle. - Price increase
They increased the price of the social word game SCRABBLE from SKK 600 to SKK 900. By what percentage did they increase the price of the game? - Hall
A rectangular hall is to be paved with square tiles with a side length of 15 cm. The hall has a length of 18 meters and a width of 3 m. How many tiles do you need to buy if 2 percent of the amount are damaged during the work? - Smoked meat
The meat loses 18% of its weight by smoking. How many kilograms of smoked meat can we make from 27 1/2 kg raw meat? - Isosceles triangle
Jan and her father were going to the tent. They found that their old tent was torn. Their mother suggested that they sew a tent with walls comprising six identical isosceles triangles. Their lower side is 2 m long, and the height to this side measures 2.5 - Active pupils
There are 35 pupils in the class, and 7 of them are active in sports. What is their percentage? - Mushroom water
A fresh mushroom weighs 8 kg. After drying, it weighed 96 dag. What percentage of water do fresh mushrooms contain? - Potato flour
Nine tons of potato flour are obtained from 50 tons of potatoes. What percentage by weight of potatoes is potato flour? - Scrap percentage
Quality control found that out of 4,200 products, 3,074 were perfect. What percentage did the scraps represent? - Store revenue
They had the same sales plan in Mr. Nový's two stores. In the first store, they exceeded the plan by 23% and in the second by 25%. They had a total turnover of € 66,000. What revenue did each store have? - Path paving cost
A 2.4 m wide path will be paved around a circular lake with a diameter of 8.2 m. How much will the paving cost when 1 m square costs 350 kc? - Two trains
Two trains are running the same distance. 1st train will travel in 7 hours 21 minutes. 2nd, the train will travel 5 hours, 57 minutes, and 34 seconds, and it is 14 km/h faster than the first train. What are the speeds of trains, and how long is this railw - Rectangle area
The dimensions of the left rectangle are 4 cm and (x+1) cm. The right rectangle consists of two rectangles: the upper one with dimensions of 3 cm and x cm and the lower one with an area of 7 cm². We know that the area of the left rectangle is the same as - Number increases
We increased the unknown number by 29% once and 41% the second time. The difference between the new numbers was 420. What was the unknown number?
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