Question

Which two temperatures have a sum of 0 degrees Celsius?

Answer 1

 −2 degrees Celsius and −2 degrees Celsius and 2 degrees Celsius and 2 degrees Celsius

Answer 2

There’s only one solution to this problem and that’s 2 degrees Celsius and -2 degrees Celsius.

2+(-2)=0
2+2=4
-2+(-2)=-4
2+0=2