Maths practice for 12-year-olds - page 112 of 353
Number of problems found: 7042
- Trapezoid angle construction
Sestroj trapezoid ABCD, if a = 8 cm, b = 5 cm, alpha = 60 °, beta = 75 ° - Manganese
Manganese bronze contains the following metals per pound: copper 0.89 lb, tin 0.10 lb, and manganese 0.01 lb. How much copper is in a shaft that weighs 235 pounds? - Diamond angle construction
Construct an ABCD diamond with side a = 4.8 cm, and the angle at vertex B is 60 ° - Chemical drum
A cylinder chemical drum is 220.5 cm long, and the radius of the drum is 42 cm. Calculate the cost of painting the drum at the rate of RS.0.15/cm². - Plot exchange area
Mr. Nový exchanged his rectangular plot of 5.2 hectares with his neighbor for two. The first plot has the shape of a square with a side of 70 m, and the second has the shape of a rectangle with dimensions of 110 m and 410 m. After the exchange, does the n - Two brothers
The two brothers have a total of 48 nuts. Two-thirds of the nuts of the first correspond to 2/5 of the number of nuts of the second. How many nuts does everyone have? - Draw triangle
Construct right triangle MNO with hypotenuse o = 5 cm and angle MNO = 37° - Saving account
After a year, the bank added 54 euros to Mrs. Eve's savings account. The interest rate on her savings account is 1.25% p.a. How many euros did Mrs. Eve have in her account a year ago? - How many
How many euros will Mr. Kováč earn if he gives two-fifths of his earnings to repay the loan, one-quarter of his earnings for an apartment and a telephone, and he has 350 euros left for other expenses? - Square garden
The square garden has an area of 36 square meters. What area will its image have in the 1:60 scale? - Aquarium shelf area
The block-shaped aquarium is 40 cm high and has a volume of 80 l. What area in m² will it occupy on the shelf on which it is built? - Living room plan
The drawing of the apartment has a scale of 1:200. The living room measures 2 cm × 3 cm on the drawing. What is the actual area of the living room in square metres? - Boat canal meeting
From Strážnice, a motor boat left the Baťa canal at a speed of 12 km/h towards the anchorage near Otrokovice. Two hours later, a second boat followed her at a speed of 20 km/h. Both ships arrived in Otrokovice at the same time. How many kilometers is it f - Renovation
Five doors with a width of 80 cm and a height of 2 m need to be sanded and wallpapered on both sides. One roll of wallpaper with wood decor measuring 80*1000 cm costs CZK 66. How many roles will we need for the renovation? - Sack of rice
A 50-kilogram sack of rice has a price of ₱1 750. How much do you pay if you only buy 35 kilograms of it? - The floor
The floor in the gym has dimensions of 6 * 12 m. Parquets have a size of 30 * 20 cm. Parquets are packed in packages of 50 pieces, and one parquet package costs 150 CZK. How many packages will we need? How much will it cost? - Science experiment
During a Science experiment, a liquid was heated at the rate of 8 degrees Celsius per minute for 10 minutes. It was then allowed to lose heat at 6 degrees Celsius per minute. If the final temperature was 76 degrees Celsius, what was its temperature 16 min - Hydrogen air weight
One liter of air weighs 1,299 g, and one liter of hydrogen 0.089 8 g. How many times is hydrogen lighter? Round the result to units. - Market open
A certain market opens for sales every 7th day of the week. If it opened last on a Friday, what day of the week will the market be opened again after nine months? (Hint: a month is 30 days) - Mr. Product
The product of the ages of all of Mr. Product's children is 1,408. The youngest child's age is half the oldest child's age. How many children does Mr. Product have, and how old are they?
Do you have homework that you need help solving? Ask a question, and we will try to solve it. Solving math problems.
