Arithmetic - problems
One brick is 2 kg and half a brick heavy. What is the weight of one brick?
- Motion problem
From Bratislavy to Martina go car at speed 83 km/h. From Martina to Bratislavy go another car at speed 62 km/h. How many minutes before the meeting will be cars 21 km away?
Points A[1,5] and B[-4,-5] are adjacent vertices of the square ABCD. Calculate area of the square ABCD.
Annual rainfall in our country are an average of 854 mm. How many m3 of water rains on average per hectare?
To circle with a radius of 98 dm from the point A guided two tangents. The distance of both points of contact is 155 dm. Calculate the distance from point A and circle centre.
- R Trapezium
Rectangular trapezium has bases 17 and 7 and area 80 cm2. What is its perimeter?
Find the length of the other diagonal and area of rhombus. The perimeter of a rhombus is 40 cm and one of the diagonals is of length 10 cm.
6 numbers are in the ratio 3:3:4:4:5:5. Their sum is 264. What are the numbers?
The cube weighs 18 kg. How weight is cube of the same material, if its dimensions are 3-times smaller?
- I think number
I think number.When I add 544 to it and subtract 194, I get a number that is 45 greater than 1207. What number I thinking?
What is the least common multiple of 28, 42, 22?
- Football league
In the 2nd football league is 19 teams. How many ways can be filled first, second and third place?
- Built-up area
John build up area 4.3 x 8 = 34.4 m2 with building with a wall thickness 50 cm. How many centimeters would have to subtract from thickness of the walls that built-up area fell by 8%?
- Lead cube
Calculate the edge of the cube made from lead, which weighs 11 kg. The density of lead is 11341 kg/m3.
Legs of a right triangle have dimensions 61 m and 39 m. Calculate the length of the hypotenuse and the height of this right triangle.
Five bus lines runs at intervals 3, 5, 10, 11, 13 minutes. In the morning, suddenly start at 7:00. After how many minutes the bus lines meet again?
- Metallurgical enterprise
Metallurgical company daily produces 873 tons of cast iron. How many tons of coke it burns to melt cast iron when 17 tons of cast consumes 13 tons of coke?
Event J has probability of 0.17. What is the probability that the event J occurs in:
How many different ways can sit 5 boys and 5 girls in line, if girls want to sit on the edge?
Calculate the integer number which, divided by 45 gives 20 and the rest 2.