What numbers add up to 15?

Answer 1

There are infinitely many possible solutions:

1 + 14, 2 + 13, 3 + 12, ...

1.1 + 13.9, 1.2 + 13.8, 1.3 + 13.7, ....

1.01 + 13.99, 1.02 + 13.98, 1.03 + 13.97, ...

And then there are sets of 3 numbers, 4 numbers, and so on.