Equations practice problems - page 3 of 247
Number of problems found: 4937
- Working group
20 men complete one third of a piece of work in 20 days. How many additional men should be employed to finish the rest of the work in 25 more days? - The tourist
A man travelled a distance of 61 km in 9 hours. He travelled partly on foot at 4 km/h and partly by bicycle at 9 km/h. Find the distance travelled on foot. - 4100 USD
$4,100 was distributed among 50 boys and girls. Each boy received $90 and each girl $65. Find the number of boys. - Susan 5
Susan has a water tank in her back garden that can hold up to 750 L of water. At the start of a rainy day (at 0:00) there are 165 L in the tank, and after a heavy day's rain (at 24:00) there are 201 L in the tank. Assuming that the rain fell at a constant - The sum 51
The sum of two numbers is 100 and their difference is 37. Find the difference between their squares. - By selling 2
By selling 100 pens, a shopkeeper gains the selling price of 20 pens. Find his gain percentage. - Percents and ratio
When 20% of one number is added to a second number, the second number increases by 50%. What is the ratio of the two numbers? - Reciprocal in equation
A positive number, when increased by 10, equals 200 times its reciprocal. What is the number? - The boat
A boatman rows 2 km against the current in 40 minutes and returns to the same spot in 30 minutes. What is his rowing speed in still water? - A plane 3
A plane left 30 minutes later than the scheduled time. In order to reach the destination 1,500 km away on time, it had to increase its speed by 250 km/h from its usual speed. Find its usual speed. - Dual profit
A merchant has 1,000 kg of sugar, part of which he sells at an 8% profit and the rest at an 18% profit. He gains 14% on the whole. Find the quantity sold at an 8% profit. - Fund raising A number of people decided to raise 3 million euros by contributing equal amounts. Had each person contributed 50 euros extra, the total contribution would have been 3.25 million euros. How many people are there?
- Dilution
How many litres of water will have to be added to 1,125 litres of a 45% acid solution so that the resulting mixture contains more than 25% but less than 30% acid? - Subtraction equation
What should be subtracted from −3/5 to get −2/3? - Two trains 16
Two trains cross each other in 14 seconds when moving in opposite directions, and in 3 minutes and 2 seconds when moving in the same direction. By what percentage is the speed of the faster train greater than that of the slower train? - Failed in examination
In an examination, 20% of the total students failed in history, 15% failed in English, and 5% of the total number of students failed in both subjects. Find the percentage of the total number of students who passed in both subjects. - Horses and hens
In a park, there are some horses and some hens. If the total number of heads is 68 and the total number of legs is 198, find the number of hens in the park. - Usual speed 2 A passenger train takes 1 hour less for a journey of 120 km if its speed is increased by 10 km/h from its usual speed. What is its usual speed?
- Sarah 7
Sarah bought snacks for her team's practice. She bought a bag of chips for $1.56 and a 20-pack of juice bottles. The total cost before tax was $33.96. Write and solve an equation to determine how much each bottle of juice cost. - A man 23
A man has some money. He gives 50% of it to his wife and 40% of the remainder to his daughter. He gives the rest to his son. If the son receives €12,000, how much did his wife receive?
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