Number of problems found: 670
- Car value
The car loses value 15% every year. Determine a time (in years) when the price will be halved.
- Sum 10
What is the probability that two dice throw twice in a row will result the sum of 10?
Tomas spent 60% of his savings for his weekly vacation. He was 32 € left. How many euros did he have before vacation?
The excavator dug 40% of the excavation in 2 hours 20 minutes. How long does it take him to dig the whole ditch?
- An investment
How long will it take for an investment to double at a simple interest rate of 5.10% p. A. ? Express the answer in years and months, rounded up to the next month.
Chocolate, which originally cost 1.5 euros, was increased by 40%. How many euros did it cost?
- Profit gain
If 5% more is gained by selling an article for Rs. 350 than by selling it for Rs. 340, the cost of the article is:
The price of the product was increased by 35%. How many percents of the new price we have to make it cheaper so that its price is equal to the original price?
- Radioactive material
A radioactive material loses 10% of its mass each year. What proportion will be left there after n=6 years?
- Rate or interest
At what rate percent will Rs.2000 amount to Rs.2315.25 in 3 years at compound interest?
What is the power output of kettle 2 kW with efficiency 90%?
- Salary increase
Ms. Merry's salary increased by 15%, and that was 83 euros. What should pay before the increase?
The enrollment at a local college increased 4% over last year's enrollment of 8548. Find the increase in enrollment (x1) and the current enrollment (x2).
There are 350 girls in the school, and the other 30% of the total number of pupils are boys. How many pupils does the school have?
- Percent chaining
Calculate 20% from 70% from 80 km
Price of the new machine is € 62000. Every year is depreciated 15% of residual value. What will be the value of the machine after 3 years?
We will throw two dice. What is the probability that the ratio between numbers on first and second dice will be 1:2?
- Deposit is pesos
Sally deposits Php.22,000 in her savings account. If the bank pays 1.5% interest per year, how much will she receive at the end of the year?
- Loan 4
Mr santos borrowed Php.18,000 at 1.5% interest for one year. What was the total amount he paid for the end of the 1-year term?
There are 1116 people working in three factory halls. In the first one, there are 18% more than the third, and 60 persons more than the second. How many employees work in individual halls?
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