Maths practice for 12-year-olds - page 304 of 309
Number of problems found: 6169
- 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 (l + 15 w)/(w) = 6, then the value of the expression (13 l)/(12 w) 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? - Disjoint
How many elements have union and intersection of two disjoint sets when the first has 1 and second 8 elements?
- 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 8.8 Eur. The bottle is 0.8 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
- Equator
Suppose that a tourist went on foot over the Globe Equator. How many meters more track made his hat on his head as the shoes on your feet? The radius of the Earth is 6378 km, and the height of the tourist is 1.7 m. - Book
The printer used 4201 digits to number the pages of the thick book. How many pages does this book have? - Expansion
If one side of the rectangle is larger 2-times and the second 4-times, what percentage increases the area of the rectangle? - Potatoes
Potatoes contain 77% starch. How many potatoes need to obtain 61.2 kg of starch? - Colors
Arnold got birthday 7 color pens in different colors. How many ways can he give them side by side in pencil?
- Map
Forest has an area of 36 ha. How much area is occupied by forest on the map at scale 1:500? - Raffle
In the pool number from 1 to 115. What is the probability that a randomly selected number is not prime? - Divisibility
Determine all divisors of a number 91. - Inflation
What is better for people (employees)? ... - 4-gon
Is it true that a 4-gon whose two sides are parallel and the other two have equal length is a parallelogram?
For what x is true x=19x?Do you have homework that you need help solving? Ask a question, and we will try to solve it. Solving math problems.
