Maths practice for 12-year-olds - page 211 of 348
Number of problems found: 6951
- Round-trip
A woman works at a law firm in city A, about 50 miles from city B. She must go to the law library in city B to get a document. Find how long it takes her to drive round-trip if she averages 40 mph. - Hrebienok 7856
A tourist would cover the route from Skalnate Pleso to Hrebienok at a constant speed in 2 hours. His friend would walk the same route from Hrebienk to Skalnaté Pleso in 3 hours. When will they meet if they both go hiking at 9:00? - Calculate 7854
The surface of the cube is 61.44 cm². Calculate its volume. - Angle's 7852
The hour and minute hands on the clock face make an alpha angle. If you know it's 10 hours and 12 minutes, what is the angle's size? - Construction of the road
Six trucks are supposed to be transported for 18 days to construct the road dam. After three days, the transport company sent two more cars to the construction site. How long will it take to carry the material? - Equation 7848
Solve the equation with the unknown a: 3 (2a + 1) = (a-3) • 4-5 - Greg and Bill Greg is 18 years old. He is six, less than four times Bill's age. How old is Bill?
- Double and triple Find the number to which it is true: Its double is five less than its triple.
- Sum of dividend
Suppose X is divided separately into 2.63 and 1.40. The results of the individual divisions are added to give a result less than X. What is X? - Numbers 7841 In the middle between the unknown number and the number 166 is the number a) 164, b) 200, c) 500 d) 1356 What are the unknown numbers?
- Smaller 7840
Which number is 2a-b smaller than a + 2b? - Younger 7832
Dad is r years old, and Mom is two years younger. The son is 20 years younger than the father. How old are they? - Half-sphere roof
The roof above the castle tower has the shape of a 12.8 m diameter half-sphere. What is this roof's cost if the cost of 1 square meter is 12 euros and 40 cents? - Hemisphere-shaped 7829
The ice cream maker sold 6l of ice cream a day. How many hemisphere-shaped portions with a diameter of 6 cm could he make from the ice cream sold? - Naturally 7826
The ratio of two natural numbers is 2:3. The smaller number naturally is 12. What is the product of these numbers? - Oranges 7824
I have 20 pieces of fruit. How many apples when pears are nine times more than oranges? - Times 7822
How often is D (24.60) less than n (24.60)? - Integer 7814
The small circle in the picture has an area of 3.5 cm². It touches from the inside and passes through the center of the large circle. What is the area of a large circle? The result round to an integer. - Society 7809
There are eight boys and twelve girls in the secret society. How many boys must they accept so that the ratio of boys to girls is 3:4 - The number
What number of 1 cm cubes are required to make a 4 cm cube?
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