Math practice for 13 year olds - page 119 of 435
Number of problems found: 8682
- Unknown 65404
If we reduce the unknown number by 336, we get 65% of its value. Specify an unknown number. - Restaurant 65394
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 - Determine 65384
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. - Measuring 65374
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; Number of shots saved; Total number of shots: Sandström; 52; 118 Štochl; 110; 266 Karaboue; 41; 99 Fazekas; 79; 195 Calculate the percentage of success of each g - Different 65344
Marian obtained two different marks in one day. How many ways these marks can he get? - Arithmetic 65324
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?
- Individually 65314
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? - Triangular 65304
The triangular plot has dimensions of 90m, 110m, and 130m. 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? - Kilograms 65254
Twelve sheep will eat 5100 kg of hay in 17 days. How many kilograms of hay will seventeen sheep eat in 12 days? a) 1020kg b) 3600kg c) 5100kg d) 7225kg - Fruit
There are a total of 28 pear and apple trees in the set. There are no other fruit trees in the set. The numbers of pear and apple trees in this order are in the ratio 3:4. Which is false? A. There are 3/4 apple trees among the fruit trees. B. There are fe - Third-graders 65204
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. - Expensive 65184
Barborka chose a backpack for school that was three times more expensive than a slipper pocket. If the backpack were 30 euros cheaper, it would cost the same as a slipper pocket. How many euros did a backpack cost? - Contributed 65174
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?
- Calculate 65154
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 65124 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.
- Substantial 65114
Calculate the volume of a regular triangular prism with a substantial edge length of 8 cm and a prism height of 17 cm. - Cube-shaped 65084
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? - Together 65074
Jana washes 20 windows alone in 4 hours. Petra would be able to do it in 6 hours. How long will it take to work together?
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