Functions - practice problems - page 9 of 313
Number of problems found: 6247
- Carol 3
Carol reduces the size of a photo by 30%. If the length of each side is 12 cm, what is the length of the side of the new photo?
- Cows and hens
In a group of cows and hens, the number of legs is 14, more than twice the number of heads. Find the number of cows.
- The population 4
The population of a city is decreasing at a rate of 2% per year. The population in 2002 was 700,000. What would be the population in 2009?
- Students 48
If 80% of the students of a school are boys and 225 are girls, find the number of all students.
- Three workers
A can do a work in 16 hours, and B alone in 24 hours. If A, B, and C work together and finish it in 8 hours, then C alone can finish it in how many hours?
- A man 19
A man buys apples at a certain price per dozen and sells them at eight times that price per hundred, find his gain or loss percent
- Increase and decrease
A number is first increased by 20% and the resulting number is then decreased by 10%. Find the overall change in the number as percent.
- Series - double GP
In the following series, which number will replace the question mark? 4, 32, 16, 128, 64,?
- Secondary 5
Secondary Middle School has 1200 students. Each student takes 5 classes a day. Each teacher teaches 4 classes. Each class has 30 students and 1 teacher. How many teachers are there at Secondary Middle School?
- Five percents
What is 5% written as a decimal?
- A trader
A trader sold two saree at Rs 96 each & it causes the same% of profit and loss to each saree. If, as a whole he gets total loss of 4%, then what is the gain/loss% in the sale?
- The price 9
The price of sugar is increased by 25%. Find by how much percent a family must reduce their consumption so that their expenditure may increase only by 10%.
- Percentages 14
If 20% of a number is 40, what is 30% of the same number?
- Same expenses
If the price of tea increases by 20%, what percent must the consumption be reduced to keep the expense the same?
- The election
Three candidates, Adam, Bibiana & Cindy, contested an election and received 1800, 3300, and 3900 votes, respectively. What percent of the total votes did Adam get?
- Girls and boys
In a class of 50 there are 23 girls and 27 boys, what percent are a. Girls b. boys
- Interest over time
If certain sum at compound interest becomes double in 5 years, then, in how many years, it will be 16 times at the same rate of interest?
- A car 10
A car covers a distance of 200 km in 2 h 40 min whereas a jeep covers the same distance in 2 h. What is the ratio of their speeds?
- A fruit 4
A fruit seller had some apples. He sells 40% apples and still has 420 apples. How many apples originally he had?
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