Algebra - practice for 9 year olds
Number of problems found: 76
- The masses
The masses of a mother and a daughter differ by 30kg and are in the ratio of 8:5. Find the mass of each. - Arithmetic progressions.
Find the sum of all the numbers between 9 and 204, which is exactly divisible by 3. - 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. - Miss Patel
Miss Patel thinks her class of 20 students will average 95 on a math test. Before she grades the last student's test, the class average is 97. What is the lowest possible score on the 20th test for the class to average 95?
- Originally 81483
There are several cubes in the box. Kamil doubled this number. Karol then took 7 cubes from the box, and 9 remained. How many cubes were originally in the box? - Diala
Diala bought some books in 2012, and then during 2013, she bought 3 times as many books as she bought in 2012. Diala bought 48 books during these two years. Make a diagram to represent the given. How many books did Diala buy each year? - Equation: 72584
Find the solution of the equation: 2x: 8 = 3 ÷ 4, where x is an integer. - Shopping trips
Luke bought some fresh produce. He picked up two oranges and three bananas. The cost of Luke's shopping was $18. Georgia also went to the same shop and bought five oranges and seven bananas. The cost of Georgia's shopping was $44. Write and solve a system - Number pattern
What are the following two numbers that occur in this pattern? 0.24, 0.48, 0.96, 1.92, ____, ____
- Tickets 10
There are two types of zoo tickets: A for adults and C for children and senior citizens. The cost of 7 type A and 4 type C tickets is 46 €, whereas the cost of 8 type A and 6 type C tickets is 57 €. Calculate the cost of 5 type A and 3 type C tickets. - Four-digit 63154
In entry 85 * 0, replace the asterisk with a number to give the smallest possible four-digit number divisible by 4. - Butterflies and bees
There were 35 flowers in the garden. The butterflies were on 17 flowers. There were butterflies and bees on eight flowers. Can you find out how many flowers were only bees? Note. There was a maximum of one butterfly and a maximum of one bee on each flower - Small painters
There are ten pupils in the painting group. Eight pupils paint with watercolors, and nine pupils with tempera colors. How many pupils paint both water and tempera colors when each pupil paints? - Wafers
They used 200 pieces to make wafers. One hundred fifty-seven topped with caramel topping and 100 with sugar topping. How many wafers did both toppings have?
- Daughter 6165
His father is 43 years old, and his daughter is 17. How many years ago was a father three times older than a daughter? - Petko 5945
Petko and Lenka are two years older than Jana. Jana is eight years old. Petko is two years older than Lenka. How old is Lenka? How old is Petko? - Hotel
The rooms in the mountain hotel are double and triple. Double rooms are 25, and triple is 17 more. How many rooms are there in this hotel? - Unknown number xyz
Find the number that is triple is 24. Solve by equation. - Student's 4287
Dorka had a total of 22 marks in her student book. She had three times less than three ones. She had only two doubles. How many units did Dorka have in the student's book, and how many threes?
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