Permutations - examplesSee also our permutations calculator.
If the number of elements is decreased by two the number of permutations is decreased 30 times. How many elements are?
- 7 heroes
5 heroes galloping on 5 horses behind. How many ways can sort them behind?
In how many ways can 7 shuttle vans line up at the airport?
How many different flags can be made from colors red, white, blue, black, yellow, green, purple, gray, orange so that each flag consisted of three different colors?
- Playing cards
How many possible ways are to shuffle 7 playing cards?
How many ways are there to arrange 9 books on a shelf?
Write the smallest and largest 3-digit number.
What is the probability that a random word composed of chars T, I, O, D, I will be IDIOT?
How many different 4 digit natural numbers in which no digit is repeated, can be composed from digits 0,1,2,3?
- Phone numbers
How many 9-digit telephone numbers can be compiled from the digits 0,1,2,..,8,9 that no digit is repeated?
Combination lock will open when the right choice of 5 numbers (from 1 to 12 inclusive) is selected. A. How many different lock combinations are possible? B. Is he combination lock named appropriately?
In how many ways can be placed 6 athletes on the podium at the Olympics? Depend on the color of the metal.
How many rectangles with area 2832 cm2 whose sides is natural numbers are?
- Logik game
Letter game Logik is a two player game, which has the following rules: 1. The first player thinks five-letter word in which no letter is not repeated. 2. The second player writes a five-letter word. 3. The first player answers two numbers - the first numbe
I have 7 cups: 1 2 3 4 5 6 7. How many opportunities of standings cups are there if 1 and 2 are always neighborhood?
How many ways can select 3 fields on classic chess board with 64 fields, so that fields don't has the same color?
Uphill leads 3 paths and 1 lift. a) How many options back and forth are there? b) How many options to get there and back by not same path are there? c) How many options back and forth are there that we go at least once a lift?
- Hockey match
The hockey match ended with result 3:1. How many different storylines may have the match?
- Three-digit numbers
How many three-digit numbers are from the numbers 0 2 4 6 8 (with/without repetition)?
At the table sit 12 people, 6 on one side and 6 on the other side. Among them are 5 pairs. Every pair wants to sit opposite each other. How many ways can they sit?