Math practice for 13 year olds - page 137 of 414
Number of problems found: 8275
- Jointly and cube power
If y varies jointly as x and the cube of z and y=16 when x=4 and z=2, find an equation representing this relationship. a. y=xz b. y = 2xz³ c.y = 2kx/z³ d.y = xz³/2 - Direct proportion
y varies directly as x and y=32 when x=4. Find the constant of variation. - Three men
If three men can do a job in 8 days, how many men are needed to do the same job in 6 days? - Three dices
What is the probability that the sum of points 14 will be a roll of three dice (B, M, Z)? - Iced tea bottle
Iced tea in a bottle costs 1.20 euros. A bottle is seven times cheaper than tea. How many euros does a bottle cost, and how much tea? - How long
How long is the diagonal of the square with side a = 50 mm? - Grass mix bag
The gardener has to prepare a grass mix containing clover grass and a meadow mixture at a price of CZK 24 per kilogram. A kilogram of mono-grass mixture costs CZK 22, and a kilogram of meadow mixture costs CZK 30. It will determine how many kilograms of m - Tea mixture package 1 kg of white tea costs CZK 1,800. 1 kg of green tea costs CZK 1,200. It determines how many grams of white and green tea will be contained in a package of Buddha's mixture if it weighs 50 g and costs CZK 65.
- Three cottages
141 guests are accommodated in 3 cottages. In the second cottage, there are eight more guests than in the first cottage, and in the third cottage, there are 14 more guests than in the second cottage. Find out how many guests are staying in the first cotta - A cone
A cone measures 6 inches in diameter at the base. The distance from the edge of the circumference to the top is 12 inches. Find its volume. - Equilateral cylinder
Find the radius and height (in centimeters) of an equilateral cylinder with a volume of 1 liter. - An equilateral cone
Determine the radius and height (in centimeters) of an equilateral cone that has a volume of 1 liter. - Inflation 2021
Calculate the real year-on-year rate of inflation when white bread in Kaufland cost in 2020 0.89 Eur and in December 2021 already costs 1.09 Eur. In the example we want to point out the real inflation felt by the people, which we understand as the exploit - A rectangular 5
A rectangular picture frame is made of wooden strips ¾ inch wide. The outside edge of the frame is 8 ¼ inches long and 6 ¾ inches wide. Can a rectangular picture 7 inches long and 5 ½ inches wide fit inside the frame? CLEARLY EXPLAIN your answer. - One-half
3 9/10 is the same as the sum of 3 1/3 and half of a number. - Find whole
Find whole numbers between 155 and 232 that are divisible by 2, 5, and 10. - Hat and scarf
Katy knitted a scarf four times faster than a hat. Knitting together lasted 15 days. How much did she knit a hat? - Door painting time
Peter and Milo painted the garage door in five hours. Peter would paint the door by himself in 10 hours. In how many hours would Milo paint the door by himself? - What is similar fraction
Which of the following is a similar fraction of 9/10,3/5,1/4 - What fraction 2
What fraction is equal to 50% of 1/3?
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