How many ways to make the number 28?

Answer 1

Infinitely many.

14+14, 13+15, 12+16, ... , 0+28, -1+29, -2+30 and so on - for ever.

Then

13.9+14.1, 13.8+14.2, ... ,

and then you have numbers with three digits after the decimal place, four, five, up to nfinitely many.

Next, you can start looking at sums of three numbers, of four number, ... ,

If you start there, you will never get round to multiples that make 28! And then there are other functions such as exponents and so forth.