Maths practice for 12-year-olds - page 294 of 347

Number of problems found: 6923

Map distance
On a map with a scale of 1:50,000, we measured the distance of places AB = 136 mm. The actual distance between cities A and B is:
Grandfather age
Dasha asked her grandfather, a good accountant, how old he was. He said: If you add 5 to my number of years and divide this sum by six, you will get the same result as subtracting 6 from my number of years and dividing this difference by five. How old is
Passbook amount
Mathias had a certain amount of money in the winning book. He won, and his stake increased by 100%. Mathias used half the money for a trip and donated what he won to his brother Jacob. How much is left in his passbook?
Natural numbers
Find all natural numbers that are twice as much as one-fifth plus nine. How many are there?
Theater tickets
Primary schools in one city received a total of 450 tickets for theatrical performances. The primary school on Košická Street received one-third of all tickets and class VII. And she got two-fifteen tickets. How many tickets to the theater performance did
Ice floe
What is the volume of an ice floe weighing 326 kg?
Gold in seawater
One cubic decimeter of seawater contains 0.000 000 01 grams of gold. How many kilograms of gold is in one cubic kilometer of seawater?
Children at pond
There were more than 40 and less than 80 children by the pond. A fifth of the children took a bath, and a seventh sunbathed. How many children were at the pond?
Fraction addition
Which same integer must we add to the reader and the denominator of the fraction 37/73 so that the fraction equals one-half?
Food supplies
The naval ship had 150 people on board and food supplies for 60 days. The captain took on board 30 shipwrecked sailors. For how many days do they have food supplies?
Map distance
On a 1:10,000 scale map, two cities are 8.5 cm apart. What distance in millimeters will these cities have on a 1:25,000 scale map?
Chickens and kittens
There were chickens and kittens in the grandmother's yard. George found that if she added one more kitten, the number of kittens and chickens would be the same. But if she added five chickens to the original number, the kittens and chickens would have the
Chickens and hares
Old mom keeps chickens and hares. He has five times more hens than hares. Boris calculated that all animals have a total of 210 feet. How many hares and how many hens does my grandmother have?
Book pages
Erik read one-fifth of the book yesterday. Today he read one-sixth of the book. He has 38 pages to read. How many pages does the whole book have?
School distance
David goes to school by bike and says: "If I go 300 meters further than two-fifths of the way to school, I have just walked one kilometer of the way." How far is David from home to school?
Cheetah vs snail
The fastest animal in the world is the cheetah, which reaches a speed of 34 meters per second. One of the slowest animals is the snail, which travels at 1/2 millimeters per second. How many times is a cheetah faster than a snail?
Iron cast
What is the weight of cast iron with a volume of 3575 cubic centimeters? The density of the cast iron is 7600 kg/m³
Dripping tap
In one day, 168 liters of water flow out of a dripping water tap. How many days will 4.2 cubic meters of water flow out?
House plans
The owner of the house received two different plans for the new building. One with a scale of 1:100, followed by the builders, and the other with a scale of 1:25, according to which he will finish the interior. In the first plan, his living room was 7 cm
Martin and Pavol
Twelve years ago, Martin was three times older than Pavol. Now, Martin is twice as old as Pavol. How old is Martin now, and how old is Pavol?

Do you have homework that you need help solving? Ask a question, and we will try to solve it. Solving math problems.