What two numbers add up to 15?

Answer 1

There are an infinite number of pairs:

(7, 8), (6, 9), (5, 10), ... , (0, 15), (-1, 16), (-2, 17), etc

then (7.1, 7.9), (6.1, 8.9), (5.1, 9.9), ... etc

and (7.2, 7.8), etc

and (7.3, 7.7), etc

etc

and then to 2 decimal places etc.

And then there are Irrational Numbers.

Answer 2

10,5 . llwvmvnnrj3nfjjfiiejrjfnnfidiiqnerjii3nnenvnneewiqii3rnnneiiisn4444mancsiiif wii2 docs nqevjgr

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Answer 3

10 and 5

Answer 4

7/8