Variations - practice for 14 year olds - page 8 of 9
Number of problems found: 164
- Three digits number
From the numbers 1, 2, 3, 4, and 5, create three-digit numbers whose digits do not repeat, and the number is divisible by 2. How many numbers are there? - Three digits number
How many are three-digit integers such that they have no digit repeats? - Training
The table contains the tennis training schedule for Saturday's younger students during the winter indoor season. Before the start of the summer season is preparing a new training schedule. Tomas Kucera will be able to practice only in the morning. Sisters - Variations
Find the number of items when the count of variations of the fourth class without repeating is 42 times larger than the count of variations of the third class without repetition.
- Task of the year
Find the number of integers from 1 to 106 with ending four digits 2015. - Combinatorics
The city has 7 fountains. Works only 6. How many options are there that can squirt? - Numbers
How many different 3 digit natural numbers in which no digit is repeated can be composed of digits 0,1,2? - Medals
How many ways can gold, silver, and bronze medals be divided among 21 contestants? - Cars plates
How many different license plates can a country have since they use 3 letters followed by 3 digits?
- Lock
A combination lock will open when the right choice of 3 numbers (from 1 to 16 inclusive) is selected. A. How many different lock combinations are possible? B. Is the combination lock named appropriately? - Coin and die
Flip a coin and then roll a six-sided die. How many possible combinations are there? - Vans
In how many ways can 5 shuttle vans line up at the airport? - Pairs
At the table sit 10 people, 5 on one side and 5 on the other side. Among them are 3 pairs. Every pair wants to sit opposite each other. How many ways can they sit? - Toys
3 children pulled 9 different toys from a box. How many ways can toys be divided, so each child has at least one toy?
- 7 heroes
6 heroes galloping on 6 horses behind. How many ways can we sort them behind? - Subsets
How many are all subsets of set C = (97, 67, 66, 18, 59, 64)? - Flags
How many different flags can be made from green, white, blue, red, orange, yellow, and purple materials, so each flag consists of three different colors? - Bits, bytes
Calculate how many different numbers can be encoded in a 16-bit binary word. - Guests
How many ways can 8 guests sit down on 10 seats standing in a row?
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