Variations - practice for 13 year olds - page 2 of 6
Number of problems found: 102
- Constructed 67424
There are six lines 3 cm, 4 cm, 5 cm, 7 cm, 8 cm, and 9 cm long, two of each length. How many isosceles triangles can be constructed from them? List all options. - Three digit from four digits
How many three-digit numbers can you make using the digits 4,6,7, and 9? - Four-digit 65124
Please find out how many different four-digit numbers we can create from the digits 3 and 8 so that the two digits three and two digits eight are used in each four-digit number created. - Individual 65004
In the computer game, you need to collect 5 objects in the room: a sword, a ring, a picture, a key, and a coin. It depends on the order in which we collect the individual objects. If the order is wrong, we will lose a life. How many are all in order?
- Sequentially 63274
In the pocket, there are six tickets marked with numbers 1 to 6. How many ways can we sequentially, taking into account the order, select 3 of them if the chosen tickets do not return to the pocket? - Wall paper
Suppose you want to paper your walls. Wallpapers are available in 4 different backgrounds colors with seven different designs of 5 different colors. In how many ways can you select your wallpaper? - Students 62184
There are 16 students in the class. If the teacher wants to choose two students who will be weekly, how many options does she have? - Three dices
What is the probability that the sum of points 14 will be a roll of three dice (B, M, Z)? - Three-digit 58943
The vortex of the three given digits formed different three-digit numbers. When she added up all these numbers, she published 1554. What numbers did Vierka use?
- Round table
Find the number of ways in which eight people can be seated at a round table, such that 2 of them always sit together. - Tic-tac-toe
In how many ways could 9 participants of the school round of five-in-a-row win the first three places? - Zubrohlava 39643
There are one asphalt road, two forest roads, and one bike path from Zubrohlava to Bobrov. Find the number of ways we can get from Zubrohlava to Bobrov and back. List all options. - Three-digit 38371
How many odd three-digit numbers can you make of the five cards with the numbers 1, 2, 3, 5, and 6? - Possibilities 38143
How many possibilities have residents of MISSISSIPPI state to choose their country's name if they have to use all the letters?
- Qualifying 37483
There are five good teams in the qualifying group for the World Cup. How many different orders can occur? - Divided 37473
Ten teams are playing in the Slovak hockey league. Gold, silver, and bronze medals are at stake. How many ways can it be divided? - Five-digit 37121
How many different five-digit numbers can we create from digits 4 and 5? - 3-digit 35271
How many 3-digit numbers can be created from the digits 1, 2, 3, 4, 5, and 6 if we must not repeat the digits? - Five-digit 35261
How many five-digit numbers do we create from digits 1, 2, and 3?
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