There is an infinite number of solutions to this problem. Some answers are 26 and 1, 30 and 5, and 56 and 31.
17 and 4 have a difference of 13 and is a factor pair of 68
There are an infinite number of numbers that have a difference of 16, 16 and 0 is a pair that fits this.
25 and 49.
25 and 49.
2 and 3 No other pair.
2 and 3 is the only pair.
16 -9
big cheese
When the order in which they are given makes no difference.
They are 25+49 = 74
The two square numbers with a difference of 21 are 25 and 4. This is because (5^2 = 25) and (2^2 = 4), and their difference is (25 - 4 = 21).
2 and 5 are one such pair.