40
36 and 64
16 and 9
27
9 + 36 (3x3) + (6x6)
-5 and 3
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)
67
the two square numbers that make 65 are 16 (4x4) and 49 (7x7)
5 and -3
-3 and 5
-5 and 3