Basic operations and concepts - practice problems - page 2 of 323

Number of problems found: 6443

Cement, sand, and gravel
Concrete tiles are made using buckets of cement, sand, and gravel mixed in a ratio of 1:4:6. How many buckets of gravel are needed for 4 buckets of cement?
Full-tank
A full-tank of petrol a car lasts for 10 days. If driver starts using 25% more everyday, how many days will the full-tank petrol last?
A recycling
A recycling bin contained 40 pounds of plastic in October and 50 pounds of plastic in November. By what percentage did the amount of plastic increase from October to November?
Gain or loss
A man purchases a certain number of apples at 3/eur and same number of apples at 4/euros. He mixed them together and sells them at 3/euros. What is the gain or loss percent? Write answer as number, loss as negative, gain as positive percent.
Saving from salary
A man spends 65% of his salary and saves 525 euros/month. Find his monthly salary.
An examination
In an examination there were 1000 boys and 800 girls. 60% of the boys and 50% of the girls passed. Find the percent of candidates failed.
The profit 4
By selling an article for 19.25 USD a trader makes a profit of 25% How much must he sell the article to make a profit of 40 %?
A lettuce
At Alan’s Produce, all produce is 20% off on Tuesdays. If a head of lettuce is normally $2.50, how much would it cost on Tuesday?
A shopkeeper 6
A shopkeeper allows 40% discount on the marked price and there is a loss of 30%. Find the profit percent if it is sold at the marked price.
Two articles
A shopkeeper bought two articles each at Rs.800. There was 25% profit on one and 25% loss on the other. Find the total percentage profit or loss in the whole transaction.
A swimming 2
A swimming pool had 2.5 million liters of water in it. Some water evaporated, and then the pool only had 2 million liters of water in it. What percent of the water evaporated?
A woodcutter
A woodcutter took 12 minutes to make 3 pieces of a block of wood. How much time would be needed to make 5 such pieces?
Wheat plus and minus
If the price of wheat is increased by 20% today, at what percent should it be decreased tomorrow, so as to bring down the price back to the original?
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
Five percents
What is 5% written as a decimal?
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%.
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
An eraser
The cost of an eraser is $ 0.80 and the cost of a pencil is $ 2. What is the ratio of their costs in simplest form?
Two discounts 2
A shirt printed with a price of EUR 150 is sold for EUR 105 after two successive discounts. If the second discount is 12.5%, then find the first discount.

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