Reason - practice problems - page 5 of 98
Number of problems found: 1955
- Summands
Find two summands of the number 42 so that its product is minimized. - Spheres in sphere
How many spheres with a radius of 15 cm can fit into the larger sphere with a radius of 150 cm? - Classroom
In a classroom are 30 students, and boys are four times more than girls. How many boys are in the class? - Variations 3rd class
From how many elements can we create 13,800 variations of the 3rd class without repeating? - Coins
On coins found was stated that from the year 87 BC. Is it right? - Divisors
The sum of all divisors unknown odd number is 2112. Determine the sum of all divisors of a number that is twice unknown numbers. - Chocolates
In the market, we have 3 kinds of chocolates. How many ways can we buy 8 chocolates? - Secret number
Find the secret number n, which reversed decreases by 16.4 if the number increases by 16.4. - Expressions 62294
Express the numbers 18, 28, 32, 40, 48, and 200 as numerical expressions composed of exactly five pairs. - Determine 82975
Determine the sum of all positive odd numbers less than 78 - Probability 17503
We choose four numbers from numbers 1 - 20. What probability will the numbers 6 or 10 be among them? - Three-digit 11041
How many three-digit numbers can be composed of 0.5,9 digits? - Rabbits 7948
Hens and rabbits, 22 heads and 62 feet, run around the garden. How many? - Squares 5479
Draw two stone squares. They have a total of 34 stones. What edges do the squares have? - Motorcycles 5024
You have 36 wheels and ten steering wheels. How many cars and motorcycles do you assemble? - Difference 1632
The difference between the two numbers is 7. Their product 144. What are the numbers? - Two dice
We roll two dice. What is the probability that the sum of the falling numbers is greater than 3? - How many
How many numbers are less than 222 with a digit sum is 8? - Chocolate and biscuit
Chocolate is twice as expensive as a biscuit. It costs CZK 8 more. How much is chocolate, and how much is a biscuit? - Mysterious area
The trapezoid ABCD is given. Calculate its area if the area of the DBC triangle is 27 cm².
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