Maths practice for 8 year olds
Number of problems found: 77
- A two
A two year old car was sold for USD 30000, 50% less than the price when new, calculate the price of the car when new.
- A person
A person buys 10 kg of commodity A at a rate of 2 kg per dollar, 20 kg of commodity b at a rate of 5 kilograms per dollar, and 30 kg of commodity C at a rate of 10 kg per dollar. Find the average price kg per dollar.
- Divide line segment
Find the point P on line segment AB, such that |AP| = r |AB| . Coordinates of endpoints: A = (−2, 0, 1), B = (10, 8, 5), ratio r = 1/4.
- Equation: 72584
Find the solution of the equation: 2x: 8 = 3 ÷ 4, where x is an integer.
- The temperature 32
The temperature in a place in Antarctica at 12 o’clock is 5’celsius and every hour it drops 4 ‘ celsius express this relationship using one equation and represent it graphically
- Two alloys
Two alloys Y and Z are each made up of zinc, tin and copper. In alloy Y, the ratio of zinc to tin is 2:5 and the ratio of copper to tin is 4:3. Determine the ratio, copper: zinc: tin in alloy Y.
- Forgave 71504
Juro owed Mir 112 euros. Miro forgave him for 35. What debt did Jur have left?
- Shopping trips
Luke bought some fresh produce. He picked up 2 oranges and 3 bananas. The cost of Luke's shopping was $18. Georgia also went to the same shop and bought 5 oranges and 7 bananas. The cost of Georgia's shopping was $44. Write and solve a system of linear eq
- Number pattern
What are the next two numbers that occur in this pattern? 0.24, 0.48, 0.96, 1.92, ____, ____
- A machine 2
A machine shop ordered the following amounts of cold, rolled, steel: 1714 lb., 597 lb., and 1043 lb. How many pounds of steel were ordered?
- The MRT train
The MRT running from Taft to North Avenue has a starting velocity of 60km/hr. After a malfunction, the brakes failed, making the train run with a velocity of 80km/hr. What is the acceleration rate if the time for velocity change is 5 seconds?
- A cyclist
A cyclist rides for 30 minutes on a style road to the top of a mountain. Of down there, the road goes downhill. Its uphill speed is 20km/h and 60km/h downhill. The distance from the summit of the mountain to its destination is 30 km. Calculate the average
- The diameter 4
The diameter of cone is 14ft and the height is 7 ft. What is the slant height?
Mimie wants to put a lace around her square frame each side of the square measures 3 feet. What is the total length of the lace that she will use?
The 7th grade has 195 students. There are 25 more girls than boys in the grade. How many more boys are in the 7th grade?
Wendy deposits R6500 into an account paying 8% annual interest compounded monthly. How much money will be in her account after 84 months paying 8% annual interest compounded continuously?
- Bicycles 66224
Mr. Veselý sells bicycles. In one month, he sold 14 bikes for 4530 CZK. How many crowns did he earn per round?
- Triangle from sticks
Bob the boulder has many sticks of length 3,5 and 7 . He wants to form triangles each of whose edges consists of exactly 1 stick. How many non congruent can be form with the sticks.
- Four-digit 63154
In entry 85 * 0, replace the asterisk with a number to give the smallest possible four-digit number divisible by 4.
- The temperature 22
The temperature in a room in the morning is 28°C. It rises by 9°C in the afternoon before dropping by 11°C at night. What is the temperature in the room at the end of the day?