Math practice for 13 year olds - page 300 of 423
Number of problems found: 8458
- Asymmetric 5407
Find the smallest natural number k for which the number 11 on k is asymmetric. (e.g. 11² = 121) - Sweethearts 5403
Four sweethearts eat ten cakes in 30 minutes. How many minutes will 27 cakes last for nine sweets? - Adela number
Adela had two numbers written on the paper. When she added their greatest common divisor and least common multiple, she was given four different numbers less than 100. She was amazed that if she divided the largest of these four numbers by the least, she - Calculate 5391
Viktor shot darts into a circular target with a radius of 5 cm. Inside the circle is a smaller circle with a radius of 2 cm. Calculate Viktor's chance of hitting a smaller circle in percent. - Holiday trip
Pavel is saving for the holiday trip. He received 1100 CZK from his father. He saved a fifth and received the rest 500 CZK from his mother. How much did his holiday trip cost? - The ladder
The ladder is 10 m long. The ladder is 8 m high. How many meters is the distant heel from the wall? - Walkers
Walker, which makes 120 steps per minute, makes the distance from point A to point B 55 minutes. The length of his step is 75cm. How long does this distance go, a boy who will do 110 steps 60 cm long in a minute? - Corresponding 5386
A football field for an interstate match must be between 100 m and 110 m long and between 64 m and 75 m wide. Calculate the area of the smallest and largest fields corresponding to the conditions. - Functions f,g
Find g(1) if g(x) = 3x - x² Find f(5) if f(x) = x + 1/2 - Non-transferable 5383
What percentage in a non-transferable year are Saturday and Sunday? - Boys and girls
There are 48 children in the sports club. Boys are ten more than girls. How many girls go to the club? - Container
The container has a cylindrical shape, the base diameter is 0.8 m, and the area of the base is equal to the area of the wall. How many liters of water can we pour into the container? - MO8-Z8-I-5 2017
Identical rectangles ABCD and EFGH are positioned such that their sides are parallel to the same. The points I, J, K, L, M, and N are the intersections of the extended sides, as shown. The area of the BNHM rectangle is 12 cm2, the rectangle MBC - Missing pupils
There are 32 pupils in the class. How many pupils were missing from school if 12.5% were absent? - Needed 5373
The box is shaped like a cube with an edge 52 cm long. How many m² of sheet metal is needed to make a box with a lid? Add 5% to the folds of the lid and walls. - Percentage 5371
There are 32 pupils in the class. A quarter of them attend a computer course. What percentage of the total number of students in the class do not attend a computer course? - Improvements 5370
After technical improvements, the radio receiver, whose price was 220 €, was auctioned for 20%. He was later reduced by 15% of the new price. What was its final price? - Calf
The weight of the calf meat obtained is 65% of the total weight of live calves. What was the weight of a calf from which 285 kg of meat was obtained? - Contributed 5368 In a specific Czech company, each employee pays 40% of the lunch price, and the remaining CZK 33 is contributed by the employer. What is the cost of lunch?
- Reading book
Susan read a 250-page book. On the first day, she read 20% of the book. On the second day, half of the remaining pages. How many pages of the book has it unread?
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