Maths practice for 12-year-olds - page 280 of 354
Number of problems found: 7071
- Square perimeter
The Czech Republic has an area of 78866 km². If this area were the area of a square, it would have a side of 280.83 km. How long before we go around this square at 50 km/h? - Circle waste
Calculate the percentage of waste when we cut out 4 of the largest possible circles from a square sheet with sides of 1 meter. - Coat price
The cost of the coat, 1500kc, was reduced by 20% and increased by 20% after a week. What is the price? - Number average
The average of the two numbers is 74. One of these numbers is a) 62.5 b) 102 specify the second number - Cheetah
The cheetah elapses 150 m for 5 seconds, the eagle reaches speeds up to 230 km/h, and the dolphin swims 1.2 km per minute. Which animal is the fastest and slowest? The results are written as meters per second (m/s). - Customer
A customer purchased three (3) writing pads from a store. She receives a k9.70 change from a k10.00 note. How much does its writing pad cost? - Exponent division
Specify the value of this expression: 34:38. - Above 100%
Find 340 percent of the numbers 45 and 55. - Number ratio
Change the numbers 34, 21, and 5.5 in a ratio of 5:2. - Exponent comparison
How many times is the number 1012 greater than the number 10-4? - Block dimensions
The volume of the block is 1000 cubic meters. Food b = 8m, food c = 12.5m. How long is the party and? - Rectangular garden 4F
The fence around the rectangular garden measures 264 2/3 m. The length of the garden is 79 1/4 m. How wide is the garden? - Block height
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. - Equation value
What is the value of x in this equation: 2.5x: 4 = 7.5. x is a natural number. - Number increase Increase number 160 by: a) 25% b) 30% c) 150%
- Expression calculations
Calculate: a) 23 - [2.6 + (6 - 9) - 4.52] b] 12.25 + 2 [2.7 - (-0.5 + 0.3 * 0.6)] - Average temperature
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. - Average speed
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?
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