Maths practice for 12-year-olds - page 241 of 307
Number of problems found: 6128
- Rectangular 3957
The block with a rectangular base measuring 18 cm and 11 cm has a surface of 1,556 cm square. Calculate the height of the block. - Calculate 3956
The rotating cylinder has a diameter of 14 cm and a surface of 1,186.92 cm square. Calculate the height of the cylinder. - Equation: 3955
What is the value of x in this equation: 2.5x: 4 = 7.5. x is a natural number. - Increase 3946
Increase number 160 by: a) 25% b) 30% c) 150%
- Calculate: 3944
Calculate: a) 23 - [2.6 + (6 - 9) - 4.52] b] 12.25 + 2 [2.7 - (-0.5 + 0.3 * 0.6)] - Temperatures 3942
The following temperatures were measured every 6 hours from 6 to 24 hours: -2.2 C, 2.1 C, 5.4 C, 3.9 C, 0.7 C, -1.9 C, -3.8 C. Calculate the average temperature from 6 to 24 hours. - Lcm simple
Find the least common multiple of these two numbers: 140 175. - Square s3
Calculate the square's diagonal, where its area is 0.49 cm square. And also calculate its circumference. - Destination 3931
The car left at 9:00 AM and arrived at the destination 144 km away at 11:00 AM. What average speed did he move?
- Beginning 3930
Roland has 490 balls. If he gave 145 bullets to Marek, he would still have 100 more bullets than Marek. How many balls did Marek have at the beginning? How many shots do they have together? - Dimensions 3929
An aquarium has 64 * 50 * 45cm dimensions and is filled 5cm below the edge. How many liters of water are in an aquarium? How many square meters are needed to produce an aquarium? - Unknown 3922
16% of the unknown number equals the square root of the number 25. Find this unknown number. - Circumference 3919
Determine the diagonal of a square whose circumference is equal to 72 cm. - Mathematical 3918
For the variables x = -8, y = 12, z = -5, evaluate these two mathematical expressions a = y-z b = z / (x-z)
- Average speed
What is the average speed you have to move around the world in 80 days? (Path along the equator, round to km/h). - Centimeters 3913 Calculate the diagonal of a square whose area equals 625 square centimeters.
- Mathematical 3911
For the variables x = 8, y = 12, z = -5, evaluate these two mathematical expressions a = y-z b = z / (x-z) - Millimeters 3903
The surface area of one cube wall is 2500 square millimeters. Determine the cube's surface, the length of its edge, and its volume. - Cube 5 The surface area of one cube wall is 32 square centimeters. Determine the length of its edges, its surface, and volume.
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