40
36 and 64
16 and 9
1 and 9
36
27
There is no pair of perfect squares that add up to 64.
9 + 36 (3x3) + (6x6)
The two square numbers that add together to make 65 are 36 and 29. This is because 36 is the square of 6 (6^2 = 36) and 29 is the square of 5 (5^2 = 25). Adding 36 and 29 together gives us 65.
67
5 and -3
-3 and 5