Maths practice for 12-year-olds - page 37 of 167

Number of problems found: 3326

Square millimeter conversion
1dm square - 7000mm square
Marriage sttus
In our city, 3/5 of the women are married to 2/3 of the men. Find what part of the population is free.
Mice of Each Color
The hat has 14 grays, eight white, and six mice. What is the smallest number of mice we have to pull out of our hats to ensure we have at least one mouse of each color?
Far country
In a country far away, the value of 3 pesos is 12 centavos, more than the value of 1 peso. How many centavos is 1 peso worth?
The florist
The florist had 200 roses in the morning. During the day, more than half sold it. The remaining roses will be tied to the bouquet. One always remains if a bouquet of 3, 4, 5, or 6 roses is bound. How many roses from the morning shipment were sold?
The lowest
The lowest temperature on Thursday was 20°C. The lowest temperature on Saturday was 12°C. What was the difference between the lowest temperatures?
Three-digit number puzzle
Dominika wrote a three-digit number ending with the number 6. When she crossed out the last digit and wrote it at the beginning of the number, she noticed that the new number was as much greater than 600 as the original number was less than 600. What numb
Flooring a room
Find the cost of flooring a room 6.5 m by 5 m with square tiles of sides 25 cm at the rate of rupees 9.40 per tile.
Coal mine
The monthly plan of 17,000 tons of coal exceeded the mine by 1/25. How many tonnes of coal have been harvested from the mine above plan?
Watch time difference
The watch is 1/4 minute ahead of the clock. We adjusted it at 7 AM. How much do they show at 3 PM?
Year month fraction
What part of the year is 6 (1,3,10,4) months?
Car Speed and Distance
The car will cover a certain distance in 3 hours and 20 minutes. If he increases his speed by 10 km/h, he will cover this distance in 2.5 hours. Calculate this distance.
Fraction product puzzle
Find such a fraction to the fraction that their product is equal to 8/11, 4, 1/100, 13/4, 1/3
Spending Money Fractions Left
Silvia had a certain amount of money in her wallet. She spent a third of it on stationery and spent three-fifths of the remaining money on groceries. She has €76 left. How much € did Silvia initially have in her wallet?
A tile
A tile setter is covering a 5ft by 5ft square shower wall. Each tile covers 4 5/8in by 4 5/8in a square. How many rows of tile are needed to reach 5ft? How many tiles are needed to cover 5ft by 5ft square
Fraction comparison puzzle
How many times is a quarter of an eighth smaller than a third of a sixth?
Cube
The sum of all cube edges is 30cm. Find the surface area of the cube.
Volume - pool
The pool, 10.5 m wide, 50 m long, and 3 m deep, will be filled in 3 days. On the first day, 2/5 of the water volume flowed into it, and 1/3 of the rest on the second day. How many liters of water flowed into the pool on the third day?
Temperature increase
Suppose the temperature at 9:am is 50 degrees. What is the temperature at 5:00 pm if the temperature increases by 4 degrees Fahrenheit each hour?
Christmas Gingerbread Distribution
The old mother baked 275 Christmas gingerbreads and kept three-fifths of them, dividing the rest among her children in a ratio of 3:4:2:1. How many gingerbreads did she give each?

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