7 & 9 !
There are an infinite number of numbers that have a difference of 16, 16 and 0 is a pair that fits this.
The two square numbers that have a difference of 9 are 25 and 16. This can be expressed as (5^2 = 25) and (4^2 = 16). The difference between them is (25 - 16 = 9).
eight times two equals 16
4 and 12
16 and 35
5 & 21
10 and 6
The numbers are 15 and 1
11 and 5
7 & 9
Any two numbers that have a distance of 16 between them, such as 0 and 16, or -16 and 0, or -8 and 8, or 6 and 22.
6+10=16 and 16-2=14