Maths practice for 12-year-olds - page 208 of 351
Number of problems found: 7018
- Initial price
The price of the T-shirt was initially 379 CZK, but it was reduced by 16%. How much does it cost now? - Candy color ratio
The number of blue and green candies is 5:6. and The number of red and green candies is 3:8. Determine the ratio of red and blue candies. - Finding Unknown Number
By reducing the unknown number by 342, you get 81% of the unknown number. Find this number. - Prize Sharing Ratio Total
Matthew, Simon, and Peter shared a profit in the ratio of 3:4:5. How much did they win in total if Matthew received CZK 1,520? - The sponsor The school received money from the sponsor. She used one-third to buy computers and half of the rest to adjust the gym. It still has 4000 euros left. How many euros did the sponsor donate to the school?
- Prism 4 sides
Find the surface area and volume of a four-sided prism high 10 cm if its base is a rectangle measuring 8 cm and 1.2 dm. - Brick density calculation
Hansel weighed a broken piece of brick and found that it weighed 48 grams. Using a measuring cylinder, he determined its volume at 30 cm³. What is the density of the brick? - Lumberjacks Trees Three Days
Lumberjacks cut down a predetermined number of trees over the course of three days. On the first day, they cut down a quarter of the trees; on the second day, they cut down 6 more trees than on the first day; on the third day, they cut down 6 more trees t - Pool tiling
The first tiler would cover the inside of the pool in 5 working days, and the second would need seven working days for the same work. In how many days would they line the inside of the pool together? - Reading Book Pages Schedule
Roza calculated that if she read ten pages a day, she would read the whole book in 18 days. After a week, however, she decided to read one more page a day. How many days will he read the entire book? - Diameter of cent coins
In what proportion are the diameters of these coins: 10 cents-diameter 19.75 mm 20 cents-diameter 22.25 mm 50 cents-diameter 24.25 mm - Step count
George makes steps 60 cm long. He will take 1530 steps on the way to school. How many steps will his father take to the class meeting if he makes steps 85 cm long? - Drain Holes Reduction
I will drain the whole tub in 4 minutes. How long would it take to drain it if I added two more drain holes? - Driver Speed Increase Time
The driver covered the distance between the two cities in 2 hours at an average 75 km/h speed. How did he change speed to get 20 minutes faster? - Cleaning the pool
The swimming pool is 25 m long, 12 m wide, and 2 m deep. The walls and bottom of the pool require regular cleaning. The company that cleans the pool charges CZK 50 per 1 square meter. How much does the owner pay for cleaning the pool? - The King
The King wants to divide his sons equally. He has 42 rubies and 45 diamonds. How many sons and how will they share them? - Workers Days Hop Garden
Twenty-four combers combed the hop garden in 6.5 days. How many combers would have to work on combing the hop garden in 5 days? - Saving for an apartment
The Adamec, Benda and Cibulka families began saving for an apartment priced at 750 000 Kč in January 1997. The Benda family had 250 000 and save 4 000 Kč monthly; the Adamec family had 370 000 Kč (Kč is Czech crown) and save 6 000 Kč monthly; the Cibulka - Difference of a half
Calculate three times the half difference of 7.5 and 2.1, - Area of rectangle
If we increase the length by twice and decrease the width by half, how many times will we increase the area of the rectangle?
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