Maths practice for 12-year-olds - page 348 of 354
Number of problems found: 7075
- Midpoints
Triangle whose sides are midpoints of sides of triangle ABC has a perimeter 83. How long is the perimeter of the triangle ABC? - The Cats and Mice Problem
Two cats caught two mice in two days. How many mouses will catch 10 cats for 10 days? - Compass
What angle is between directions J (Juh) and ZSZ (ZápadoSeveroZápad) on the compass? - Balance
The rod is 4.3 m long, hanging weights 9 kg and 15 kg on ends. Where is the center of the rod (distance from weight 9 kg) to be in balance? - Gear
Two gears fit into each other and have a transfer of 1:2. The centers of gears are spaced 96 cm. What are the radii of the gears? - Cubes
Surfaces of cubes, one of which has an edge of 42 cm shorter than the other, differ by 16128 cm². Determine the length of the edges of these cubes. - Subway
The Subway train went between two stations that gradually accelerated for 26 seconds and reached a speed of 72 km/h. At this rate, it went 56 seconds. Then 16 seconds slowed to a stop. What was the distance between the stations? - ŽSR
Calculate fixed annual personnel costs of operating monorail line 143 km long if every 5 km is a station that serves three people - one dispatcher and two switchmen in 4-shift operation. Consider the average salary of the employee 884 euro. - Salary
Calculate the equivalent annual salary to an hourly wage of $ 15. Assume a 33-hour workweek. - Chocolate
How many times do we have to break a chocolate bar composed of 10 × 12 pieces to get the 120 parts? - Washer
The washing machine drum washes at 64 RPM. The washing machine motor pulley has a diameter of 6 cm. What must be the diameter of the drum machine pulley when the motor is at 367 RPM? - Cube
The cube weighs 11 kg. How weigh is a cube of the same material if its dimensions are 3-times smaller? - Water
Into a full cylindrical tank high 3 m with a base radius of 2.5 m, we insert a cuboid with dimensions 1.7 m, 1.3 m, 1.9 m. How many liters of water will overflow out? - Expression
If it is true that (p + 9 m)/(m) = -19, then the value of the expression (13 p)/(11 m) is: - News
From 28 students buy magazines, 10 The economist students, 10 Pravda students, and 18 students don't buy any of these magazines. How many students buy both magazines? - Three numbers
Create from digits 1-9 three-digit numbers with their sum the smallest. What value is the sum of these numbers? (Use each digit only once) - Tippler
Bottle with cork cost 6.6 Eur. The bottle is 0.6 euros more expensive than the cork. How much are a bottle and the cork? - Compare
Compare fractions (34)/(3) and (12)/(4). Which fraction of the lower? - Homework
In the crate are 18 plums, 27 apricot, and 36 nuts. How many pieces of fruit were left in the crate when Peter took 6 ninth: 1. nuts 2. apricots 3. fruit 4. drupe - Sea on the Moon
Assume that the Moon has a sea with the same composition as Earth's (it has the same saltwater density). Calculate the boat's dive floating in the sea on the Moon when on Earth, it has dived 3.9 m. Consider that the Moon has 6.5-times smaller gravitationa
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