Math practice for 13 year olds - page 110 of 428
Number of problems found: 8555
- Add quarter to a number
What is the total of 80 plus 1/4 of 120? - Box wrapping paper
Mother and daughter Susan are wrapping presents for father. Maťko has a cube-shaped box with dimensions of 9 cm, 3 cm, and 7 cm, and Zuzka has a box in the shape of a cube with an edge length of 3 cm. How many square cm of wrapping paper will they use in - Triangle side possibilities
Which three lines of a given length can be three sides of a triangle? A / 42mm; 22mm; 12mm; B / 5cm, 50mm, 6cm; C / 10m, 5m, 50dm; D / 2.1cm, 4.2cm, 1.9cm - Prism grid sketch Sketch a grid of a quadrilateral prism with a rectangle of 1 cm x 3 cm and a height of 5 cm.
- Base diameter
Calculate the volume and surface of a cone whose base diameter is 6 cm and height is 0.9 dm. - Triangle perimeter ratio
The PQR triangle with a circumference of 25.5 cm has sides in a ratio of 4:6:5. Determine the lengths of its sides. - An airplane 2
An airplane left Changi International Airport at 9 PM and flew 5841 km to Dubai International Airport. If the airplane flies at an average speed of 649 km/h, what is the plane's arrival time? A) 6 AM the same day B) 8 AM the same day C) 6 AM the next day - Quarter of unknown number
If we subtract a quarter of a number from the number 12, we get the number -5. What's that number? - Digits - numbering
We used 1533 digits to number the rough book. How many pages does this book have if each page, including page 1, is numbered? - Parallelogram angle size
How big are the internal angles in the parallelogram when we know that the angle at one vertex is twice as large as the others? - Dice even probability
We roll the dice twice. What is the probability that if an even number falls for the first time, the even number will fall a second time? - Triangle angle ratio
Calculate all interior angles in the isosceles triangle ABC if we know that BC is the base, and we also know: | ∢BAC | = α; | CABCA | = 4α - Submerged cork body
The cork body floats first in water and then in glycerol. The submerged volume of the cork body in water is 0.0006 m3, and in glycerol, it is 0.0005 m³. The density of water is 1000 kg/m3, and the density of glycerol is 1200 kg/m³. C - Two-digit number creation
How many natural two-digit numbers can we form from the digits 0, 1, 2, and 3 if we cannot repeat the digits in these numbers? - Line ratio division
We divided line AB into two parts in a ratio of 3:5. The longer part was 6 cm longer than the shorter part. How long was the whole line in cm? - Father son painting
A father and son paint the apartment together in 6 hours. My father would paint the apartment in 9 hours. In how many hours would the son paint the apartment himself? - Today 2
Today only, a desk is being sold at a 72% discount. The sale price is $100.80. What was the price yesterday? - On Tuesday 2
On Tuesday, the temperature at 9 AM at Camden's house was -4°Fahrenheit. By 4 PM, the temperature at his house was 8°Fahrenheit. Which statement about the change in temperature from 9 AM to 4 PM at Camden's house is true? Is house true? A. The temperature - The temperature 29
The temperature at 6 P.M. is -11°Fahrenheit. During the night, the temperature rises by 7°F drops by 3°F, and rise by 5°F. What is the temperature after these changes? - Delta t
The temperature decreased 14°F between 10 PM and 4 AM. The temperature at 4 AM was 67°F. What was the temperature at 10 PM?
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