Maths practice for 12-year-olds - page 211 of 350
Number of problems found: 6986
- Isosceles triangle
In an isosceles triangle, the arm's length and the length of the base are in a ratio of 3 to 5. What is the length of the arm? - Workers - earning
Twelve workers would earn € 800 in 10 days. How many euros would 14 workers earn in 8 days? - Which
Which decimals, when subtracted, equal 3.89: a - b = 3.89 - Two-fifths 7764
No one got a grade worse than three. A third of the class got one, two-fifths two, and eight students had three. How many students had one or two? - Soccer team
Hilahs soccer team is trying to raise $2414 to travel to a tournament in Florida, so they decided to host a pancake for breakfast. How many people need to attend their breakfast to raise $2414 if the profit per pancake is $1.5? - Diameter of a cylinder
The diameter of the cylinder is 42 cm. How many times does the cylinder turn on a 66 meters long track? - Laboratory
Mang Elio went to his laboratory at 7:00 AM and recorded the temperature as 11.07°C. At lunchtime, the temperature rose by 27.9°C but dropped by 8.05°C at 5:00 PM. What was the temperature at 5:00 PM? - Calculate 7750
Calculate how many seconds the teaching lasts for the whole school year and write in the form a * 10^n - Regularly 7749
Three steamers leave the port. The first regularly returns after three months, the second after four, and the third after six months. How long before they meet again in the port? - Simultaneously 7748
The monitor screen is blank. Four new wheels appear on the screen every seven seconds when the beep sounds. On the contrary, three wheels disappear from the screen every eleven seconds. If both actions should take place simultaneously, the number of circl - Cylinder 7744 What is the height of the cylinder if the volume is 8,478 cubic meters and the area of the base of the cylinder is 706.5 cm square?
- Calculate 7743
The wire is wound into several turns. The thickness of 10 threads is 1 cm. Calculate the wire thickness. - Two gears
The two gears fit together. The larger gear has 32 teeth. The smaller gear has 20 teeth fewer. How many times does turn a smaller gear if the bigger gear turns three times? - Specifications 7731
There are 80 parking spaces in the parking lot, of which 1/20 is reserved for the disabled and another 4 spaces for families with children. Express as a fraction what part of the parking lot is free for vehicles without the specified specifications. - Sum of four numbers
The sum of four consecutive natural numbers is 114. Find them. - Eight years ago
The son asks his father how old he is. My father said: I will have twice as much as I had eight years ago in ten years. - Minutes 7720
Miloš goes to school on roller skates at a speed of 18 km/h. The journey takes 15 minutes. What speed does he have to go if he wants to be at school 5 minutes earlier? - Two thirds
Two-thirds of the unknown number is 8/7. What is 7/3 of this number? - Proportion of the continents
The area of Asia and Africa is 8:7, and the area of Europe and Africa is 5:6. In what proportion are the sizes of regions of Asia, Africa, and Europe? - Bottle
A company wants to produce a bottle with a capacity of 1.25 liters. Find the dimensions of a cylinder that will be required to produce this 1.25 liters if the height of the cylinder must be five times the radius.
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