Variations + reason - practice problems - page 4 of 7
Number of problems found: 127
- Possibilities 8450
There are 11 pupils in the group, among them just one Martin. How many possibilities are there for distributing 4 different books to these pupils if each is to receive at most one and Martin just one of these books". - Probability 8419
What is the probability that when dealing cards after 4, in the game Quartet (eight of fours), we will get the whole quartet? - Participants 8335
How many ways can you be rewarded in the 1st, 2nd, or 3rd place? The prize for 15 participants in the competition? - Third-class 8334
If we add one element to set A, the number of third-class variations increases two times. How many elements did the set initially contain?
- One three
We throw two dice. What is the probability that number three falls maximally once? - Possibilities 8237
How many different possibilities of settling friends A B C D E F on six seats if A wants to sit next to C - Bookshelf and books
How many ways can we place seven books on a bookshelf? - 4-digit 8231
How many 4-digit numeric pin codes can be created so that not all four digits are identical? - A jackpot
How many times must I play this jackpot to win? A jackpot of seven games having (1 X 2), i.e., home win or away win.
- Necklaces 8006
Elena has four beads: yellow, two pink, and green. How many different colored necklaces can he create? - Four-digit 7953
How many four-digit codes on the wheel lock can we create from the digit 0,1,2,3,4,5,6,7,8,9 if it is true that we cannot repeat the numbers? - Volleyball 7827
In the volleyball tournament, three teams and four foreign teams played, each with each other, in one match without revenge. How many games have been played? - Pages counting
There are pages numbered 2 to 104 in the book. How many digits have to be printed to number the pages? - Numbers 7755
How many digits 7 are in numbers from 1 to 777?
- Chocolates
How many ways can we distribute eight different chocolates to four children? - Competition 7328
Adam was practicing for a darts competition in class. Every day at home, he threw darts at a target in which the individual fields were worth 1,3 and 5 points. He threw 9 darts every day and always scored 27 points. He is in good form and never missed a t - Three-digit 7248
Find all three-digit numbers n with three different non-zero digits divisible by the sum of all three two-digit numbers we get when we delete one digit in the original number. - Five-digit numbers
How many different five-digit numbers can be created from the number 2,3,5 if the number 2 appears in the number twice and the number 5 also twice? - Notation 7014
There is no 0 in the decimal notation in natural numbers, and there are even numbers or odd numbers, each at least once. Find the number of all k-digit natural numbers.
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See also our variations calculator. Variations - practice problems. Reason - practice problems.