Maths practice for 9-year-olds
Number of problems found: 460
- Dilution
How many liters of water will have to be added to 1125 liters of the 45% solution of acid so that the resulting mixture will contain more than 25% but less than 30% acid content? - Electric iron
If the temperature of electric iron is 8 degree Celsius and rise by 10 degree Celsius, what is the current temperature? - The supplementary angles
Two supplementary angles differ by 50°, find the measure of each angle. - Drying fruit
Fresh fruit contains 68% water and dry fruit contains 20% water. How much dry fruit can be obtained from 100 kg of fresh fruits? - Sum of squares
If the first number is 80% of the second number and 4 times the sum of their squares is 656, find the numbers. - Squares of odd
Find the average of squares of consecutive odd numbers from 1 to 13. - Decorations 3
Each bundle has 48 red and white roses. There are 30 red roses in each bundle, and the rest are white. How many white roses are there in all?
- A train 2
A train 90 meters long is moving at speed 80 km/h overtakes a second train moving at 56 km/h in the same direction and passes completely in 25 1/2 seconds. Compute how long is the second train. - Locker combination
Todd forgot the first two numbers of his locker combination. The numbers can be any number 1 through 6. What is the probability that he will guess the first number correctly and the second number incorrectly? - Earnings 4
Joey earned $35, which is five times more than Leo earned. How much did Leo earn? - Pants
Peter bought 58 pairs of pants, 18 of which were torn. How many pants were not torn, which he had? - The mean 2
The mean cost of 4 items was $39.96. The first item cost $28.50, the second item cost $41.25, and the third item cost $50. Find the cost of the fourth item. - A car 9
A car travels at 34 km/hr. How far does it take to travel in 2 hours? - The cattle
The cattle at the Howard Farm are fed 32 bales of hay each day. The horses are fed 1/2 as much hay as the cattle. How many bales of hay are the horses fed each day? - Award
Out of 36 students, 16 were awarded, 19 passed, 1 failed. Determines the percentage of honors and successful students in the class.
- Arithmetic progressions.
Find the sum of all the numbers between 9 and 204, which is exactly divisible by 3. - Rita runs
Rita runs 4.18 km every day. What will be the total distance covered by Rita in 23 days? - A man 17
A man deposits 200 in his bank account every month for 11 months and then withdraws 1500. What is his bank balance? - An orange
An orange Grove has 858 trees. There are 33 rows, each with the same number of trees. How many trees are in each row - Library 4
Library A has a total collection of 250 books. Library B has 100 more books than Library A, and Library C has twice as many books as the combined number of books in Library A and B. What is the total number of books in libraries A, B and C?
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