Percentages - practice for 13 year olds - page 15 of 56
Number of problems found: 1105
- Municipalities 63534
The tachometer with a relative measurement error of 5% showed a speed of 49 km/h when crossing municipalities. Did the car driver exceed the permitted speed of 50 km/h? - Estefania
Estefania bought a video game player. She does not remember the price before tax. She does know that the 6% sales tax came to $4.80. To find the price of the game player, she drew a percent bar or tape diagram. What was the price of the game player before - Probability 63304
One hundred fifty pupils go to the 9th year of primary school. Of these, 66 have no siblings, 39 pupils have one sibling, 18 pupils have two siblings, and the remaining pupils have more siblings. What is the percentage probability that a randomly selected - Weighs 63254
The water court weighs 520 kg. The weight of the barrel is 60% of the total weight. What is the mass of water?
- Original 63184
If you reduce the unknown number by 90, you get 88% of its original value. Specify this unknown number. - Smaller 63064
From which number is the number 60 20% smaller? - Regular 62524
The floor in the game tower has the shape of a regular hexagon with a side length of 5m. How many pieces of parquet must be ordered to cover it if 25 pieces are needed for 1 square meter, and we must add a reserve of 10%? - Withdrawals 62324
A person deposits 5,000 euros into a bank account at the beginning of each year for 10 years. He does not make any other deposits or withdrawals from the account. Determine the total amount saved at 8% compounded annually when interest is compounded annua - Cross-country 62244
How many cross-country skis have risen in price if they increased the original price of € 75 to € 90
- Male players
In the game, 15 players played, and there were six males. What percent of males played in the game? - Wealthiest 61834
Iron is produced in a blast furnace from iron ore. The wealthiest iron ore is magnetite, which contains 45-70% iron. How much magnetite do we need to get 3 tons of iron? - Bronze
How much tin is in 3.6 kg of bronze if it contains 15%? - Plants
The number of germinated plants increased by 50% to 300 from morning to evening. How many plants germinated in the morning? - After the discount
The dishwasher costs 210 EUR after the discount. How much did it cost before the discount if the new price is 90% of the original price?
- Saving account
After a year, the bank added 54 euros to Mrs. Eva's saving account. The interest rate on her savings account is 1.25% p. a. How many euros did Mrs. Eva have on her account a year ago? - Dimensions 60943
We will reduce one edge of the block with dimensions of 2cm, 4cm, and 6cm by 20%. How does the volume of a block change? What percentage? - A student 3
A student earned a grade of 80% on a math test with 20 problems. How many problems on this test did the student answer correctly? Round to the nearest whole number. - Following 60793
I want to turn to help with the following example. How do I reach an 8% solution? I need to mix 3.5% milk with 33% cream. Thank you for being so helpful. - Production 60701
The enamel for the production of bottles contains defects. The average number of caries is 15 per 100 kg. The bottle weighs 1 kg. What is the proportion of defective bottles?
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