Leaving aside permutations, there are five distict ways of writing the number 4 as the sum of 5 non-negative integers.
3
One. And that is 84.
As many as you want. You can write any number of additions, subtractions, etc. that result in this number.
There are many ways to write it. Here's one: 170.00000You can write as many zeros as you want after the decimal point.
If you write every number once, then you will write the number nine exactly once. If you mean "... the digit9, it should appear 20 times: 10 times in the ten's place, and 10 times in the one's place.
As many as you want.
As many as you want. An unlimited number of ways.
How many languages can you write......? The answer: a lot (depending on the above question)
you can write that answer a thousand million ways!
3
One. And that is 84.
There are three ways you can write the number 10. You can use X, as in Roman numerals, ten, or 10.
As many as you want. You can write any number of additions, subtractions, etc. that result in this number.
There are many ways to write it. Here's one: 170.00000You can write as many zeros as you want after the decimal point.
If you write every number once, then you will write the number nine exactly once. If you mean "... the digit9, it should appear 20 times: 10 times in the ten's place, and 10 times in the one's place.
111 is the answer
An infinite number.