Maths practice for 12-year-olds - page 201 of 355

Number of problems found: 7083

Numbers division
What number should be divided by the mixed number 2 3/4 to get 11/12?
Absolute reciprocal calculation
What do I get by multiplying the absolute value of -0.7 and the reciprocal number of 10? What do I get by dividing the opposite number by the number -14/8 and the reciprocal number to the number 4?
Tractor motorcycle pursuit
The tractor leaves the field and heads towards an agricultural cooperative 14 km away at an average speed of 20 km/h. Twenty minutes later, an agronomist followed him from the same field on a motorcycle at an average speed of 45 km/h. Will he catch up wit
Buying confectionery
Jana spent 1/2 of her savings on the confectionery, gave 1/3 for her notebook, and had 7 euros left. How many Euros did Janka save?
Perimeter of the garden
The length of the garden measures 27 1/4m. How many meters is this dimension larger than the width of the garden, which measures 15 1/2 m? Calculate the perimeter of the garden.
Number fraction puzzle
If we add 1/7 to the given number, we get 1/2. Specify the number.
Map scale distance
The particular map has a scale of 1:75000 a) The distance between the two places on the map is 42mm. What is the actual distance? b) How long would the distance show, 15.75 km on the map?
Cut trees
There are 1,200 trees in the grove, of which 55 percent are deciduous, the remaining coniferous. Workers cut down 35 percent of a) trees, b) deciduous trees, and c) coniferous trees. How many trees now have this grove?
Cement consumption calculation
During concreting, the workers used 1/2 of the total amount of cement on the first day, 1/2 of the rest on the second day, and the remaining 15 q of cement on the third day. How much cement did they consume in total?
Sparklers
Roman lit his 10 equally-sized sparklers one by one on New Year's Eve. He lit the first one. When only one tenth of it remained, he lit the second one; when only one tenth of that remained, he lit the third, and so on. The sparklers burn at a constant rat
Pool bucket emptying
How many five-liter buckets will empty the pool measuring 2.4m and 2.8m, and 1.4m deep?
Meteorological measurement
The meteorological measurement showed the evening temperature at 18:00 at 21.3 degrees. At 21:00, the mercury on the thermometer stopped at 20.5 degrees. By how many degrees did the evening temperature drop in 3 hours?
Square garden calculation
The square garden has an area of 735 m² and is completely fenced. Calculate the length of the garden side and the length of its fence.
Break time
Calculate how much percent of school time is spent on breaks. Calculate data for the whole week.
Fraction comparison puzzle
Which is more than two-thirds of the 99 or three-quarters of the 80?
Barrel
The barrel of wine is filled by 9/14. What part of the barrel will remain filled when 1/4 of the wine we pour from the barrel?
Boys school count
Two-thirds of boys are in sports school. How many boys are there in school if there are 212 girls?
Year 2020
The four-digit number divided by 2020 gives a result of 1, **. (Can not be in form 1,*0. ) Write all the options.
Cylinder surface calculation
The area of the cylinder shell is 300 cm², the height of which is equal to the diameter of the base. Find the surface of the cylinder.
The cuboid
The cuboid is full to the brim with water. The external dimensions are 95 cm, 120 cm, and 60 cm. The thickness of all walls and the bottom is 5 cm. How many liters of water fit into the cuboid?

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