002+002+001=005
There are no three-digit numbers that equal 17. In fact, there are no numbers with more or less than two digits that equal 17. In fact, in the whole infinite supply of numbers, there is only one single number that equals 17. That number is . . . . . . . 17 .
27 three digit numbers from the digits 3, 5, 7 including repetitions.
24
2
-4
21.
21
There are 15 of them.
With 123 digits you can make 123 one-digit numbers.
There are no 3-digit whole numbers whose digits sum to 3. The smallest 3-digit number is 100, and the largest is 999, but in neither case is the sum of the digits equal to 3.
There are 5460 five digit numbers with a digit sum of 22.
There are no three-digit numbers that equal 17. In fact, there are no numbers with more or less than two digits that equal 17. In fact, in the whole infinite supply of numbers, there is only one single number that equals 17. That number is . . . . . . . 17 .
27 three digit numbers from the digits 3, 5, 7 including repetitions.
5040 different 4 digit numbers can be formed with the digits 123456789. This is assuming that no digits are repeated with each combination.
757
There are 90000 5-digit numbers.
7 two-digit numbers.