Comparing - practice for 13 year olds - page 8 of 9
Number of problems found: 169
- Different 5402
Adélka had two numbers written on the paper. When she added their greatest common divisor and least common multiple, she was given four different numbers less than 100. She was amazed that if she divided the largest of these four numbers by the least, she - Champion 5098
Compare the odds of pairs of events. A) Slovakia will be the world champion in ice hockey 2 times in a row. B) You will write all the papers this year with at least a double. C) In two years, humans will be on Mars. D) Someone in your class will write all - Inequality 4687
Which x satisfies the inequality 5 - Comparing salaries
Spouses compared salaries. Mrs. Janka found a 20% higher salary than Mr. Jaroslav. Together they earned € 1,430. How much do they earn each of them?
- Rectangular 4546
Thirty watering cans of 8 liters of water are brought to the rectangular garden measuring 15 m and 10 m. During the rain, 2 mm of water fell on the garden. When was the flowerbed more watered? - Percents
How many percents is 900 greater than the number 750? - Fe vs. H2O
The volume of what the body of the same weight is greater: iron or water? - Parallelogram 3567
One side of the parallelogram is 5 cm. Can it have 3 cm and 6 cm diagonals? - Determined 3488
Find out if there is a triangle whose two sides are 5 cm, and 8 cm long and the middle bar determined by their centers is 1.5 cm long.
- Circumscribed circle to square
Find the length of a circle circumscribing a square side of 10 cm. Compare it to the perimeter of this square. - Mr. John
Mr. John wants to buy winter apples Spartan. There are two ways to buy: 1) buy apples at the marketplace, where 1 kg costs 15 CZK. 2) Bring the car to the agricultural farm, where the apples are sold for 9 CZK per kilogram. However, he must pay CZK 150 fo - Smallest internal angle
Calculate what size has the smallest internal angle of the triangle if values of angles α:β:γ = 3:4:8 - Denominator 2883
Write a fraction with a denominator of 200 greater than 0.39 and less than a two-fifths fraction. Write its numerator x. - One-fifth 2869
Find all natural numbers that are twice as much as one-fifth plus nine. How many are there?
- Millimeter 2844
The fastest animal in the world is the cheetah, which reaches a speed of 34 meters per second. One of the slowest animals is the snail, which travels at 1/2 millimeters per second. How many times is a cheetah faster than a snail? - Horses 2773
Horses, sheep, and ducks graze in the meadow. Sheep are more than ducks. Sheep and ducks have a total of 100 heads and legs. Ducks and sheep are three times more than horses. How many horses are there? - Is right?
Determine whether the triangle with legs (catheti) 19.5 cm and 26 cm and the length of the hypotenuse 32.5 cm is rectangular. - Grass garden
Mr. Grass would itself be mowed garden for 5 hours. His son Michael could do it for 7 hours. They agreed that they wake up at 5 am and begin to mow together. Ms. Grass needs to drive into town at 8.30. Michael says that at that time, they're done with wor - Mr Novak
Mr. Novak earns an average 927 euros. When increasing the salary, they gave him a choice: ... What is a better choice for Mr. Novak?
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