Maths practice for 12-year-olds - page 202 of 355

Number of problems found: 7083

Three-digit number composition
How many three-digit numbers can be composed of 0.5,9 digits?
45th birthday
This year Mrs. Clever celebrated her 45th birthday. Her three children are now 7, 11, and 15 years old. How many years will Mrs. Clever's age equal the sum of her children's years?
Kilowatt-hours
If the Lewis family used 648 kilowatt-hours of electricity in 12 days at the same usage rate, how many kilowatt-hours should they use in 24 days?
Garden netting comparison
Mr. Novotny's rectangular garden measures 35m and 27m. Mr. Sovák's square is 29 m long. Who uses more netting to fence their garden, and how much?
Bridge length calculation
The city plan has a scale of 1:1500. Find the actual length of the bridge, which measures 1.1 cm on this plan.
Math test
In mathematics, there were 25 problems of three kinds: light 2 points, medium 3 points, and heavy 5 points, and the best score was 84 points. How many points did Jane have when she solved all the easy examples, half of the medium, and one-third of the dif
In center
What number lies in the center between a quarter of a fifth and a half of a third on the number axis?
Square perimeter calculation
Calculate the perimeter of a square if its area is 6.25 square centimeters.
Coal mine
The towing wheel has a diameter of 1.7 meters. How many meters does the elevator cage lower when the wheel turns 32 times?
Divide candies
John, George, and Adam shared candies in a ratio of 2:3:1. John received six candies. How many candies did the boys share?
Unknown number equation
Twice, the difference between the number 50 and the unknown x reduced by the unknown x is equal to the number 106. What is the unknown number?
Candle collection count
The well-known Candle Collector, Antonín, had half of the blue candles in his collection, a third of the candles with a colored motif, and 128 green candles. How many candles does Antonín have in his collection?
Radius of the circle
Calculate the radius of the circle whose length is 107 cm larger than its diameter
Dividing money
Vilem, Cenek, and Edita divided the money they earned by spreading the leaflet. Vilem got 240 CZK more than Cenek and twice as much as Edita. Edita got 400kc less than Vilem. How much did each of them earn?
Video game
Nicole is playing a video game where each round lasts 7/12 an hour. She has scheduled 3 3/4 hours to play the game. How many rounds can Nicole play?
Number
What number should be placed instead of the asterisk in the number 702*8 to get a number divisible by 6?
Surface - cube
What is the length of the edge of the cube, the surface of which is 384 dm²
Free time
Anita had 2 1/4 hours of free time in the afternoon. She spent 2/3 of her free time playing sports and watching TV for 30 minutes. How much time did she have left to read the book? Express the result as fractions of hours and numbers in minutes.
New bridge
Thanks to the new bridge, the road between A and B has been cut to one-third and is now 10km long. How much did the road between A and B measure before?
Pizza
Five friends were together for pizza. Adam divided his pizza into thirds, Boris in quarters, Denis in patina, and Luke in sixth. Then Simon also came to them. Every five boys gave him one piece, leaving him one whole pizza. How many equal parts did Ivan s

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