Math practice for 13 year olds - page 125 of 415
Number of problems found: 8285
- Unknown number reduction
If we reduce the unknown number by 336, we get 65% of its value. Specify an unknown number. - Restaurant waiter guests
The restaurant was fully booked at lunchtime. While only three waiters staffed the restaurant, guests waited an average of 45 minutes for the lunch menu. On average, how many minutes will the guests wait if the three waiters are joined by two more waiters - Number summand division
We divide the number 210 into two summands so that one summand is 30 less than three times the other. Determine the larger of the summands. - Block diagonal length
Calculate the length of the body diagonal of a block measuring 6 cm, 7 cm, and 10 cm, and round the result to two decimal places. - Sandström
The table shows the top four goalkeepers at the World Handball Championship in Croatia. Name; Shots saved; Total shots faced Sandström; 52; 118 Štochl; 110; 266 Karaboue; 41; 99 Fazekas; 79; 195 Calculate the save percentage of each goalkeeper. Who has th - Marian mark ways
Marian obtained two different marks in one day. How many ways these marks can he get? - Martin history grades
Martin has an arithmetic average of 2.8 out of five history grades. If he only gets one from now, how many ones would he have to get at least so that the arithmetic mean of his history grades is less than 2? - Bakery worker output
A bakery worker makes 300 rolls more than an apprentice in 2 hours. In 4 hours, they both made 9800 rolls together. What are the hourly output of the worker and the apprentice individually? - Plot map sides
The triangular plot has dimensions of 90 m, 110 m, and 130 m. The land is drawn on a map with a scale of 1:2000. Find the lengths of its sides on the map in centimeters. - Three digit from four digits
How many three-digit numbers can you make using the digits 4,6,7 and 9? - Sheep hay consumption
Twelve sheep will eat 5100 kg of hay in 17 days. How many kilograms of hay will seventeen sheep eat in 12 days? a) 1020 kg b) 3600 kg c) 5100 kg d) 7225 kg - Fruit
There are a total of 28 pear and apple trees in the orchard, and no other fruit trees. The numbers of pear trees and apple trees are in the ratio 3:4. Which statement is false? A. Apple trees make up 4/7 of the fruit trees. B. There are fewer pear trees t - Tournament sophomore percentage
Forty-eight high school students took part in the chess tournament. The number of first-graders, sophomores, and third-graders is 3:8:5. Calculate what percentage of sophomores participated in the game. - Backpack pocket price
Barbara chose a backpack for school that was three times more expensive than a shoe bag. If the backpack were 30 euros cheaper, it would cost the same as a shoe bag. How many euros did a backpack cost? - Katy ski price
Aunt and uncle bought Katy's skis together. They were 3:2 for the entire price of the skis. Uncle contributed 60 euros. How many euros did Katy's skis cost? - Triangle area grid
Each square of the net has an area of 25 mm². Calculate the area of the DEF triangle in cm². Express the result as a decimal number to three decimal places. - Four-digit number digits Please find out how many different four-digit numbers we can create from the digits 3 and 8 so that the two digits three and two digits eight are used in each four-digit number created.
- Triangular prism volume
Calculate the volume of a regular triangular prism with a substantial edge length of 8 cm and a prism height of 17 cm. - Container salt edge
The cube-shaped container can hold precisely 8 cm³ of bath salt. How many cm³ of bath salt will fit in a cube-shaped container with an edge twice as long? - Jana Petra windows
Jane can wash 20 windows alone in 4 hours. Petra can do the same job in 6 hours. How long will it take them working together?
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