No.
The two numbers are... -36 and -36
They are 40 and 40
Ten and six.
64
4 and 9.
No.
137 and 11 are two prime numbers that add up to 148.
The two square numbers that add up to 225 are 144+81 = 225
2 numbers that add up to 8
62.5 and 37.5
The two numbers are... -36 and -36
50 and 45
None. Any two odd numbers add up to an even number.
None. If you add two even numbers, you'll end up with another even number.
A similar rule is to check if two numbers add up to more than 5.
The two square numbers which add up to 13 are 9 (which is equal to 3 squared), and 4 (which is equal to 2 squared).