Answer:
Prime. Prime numbers can only be divided by the whole number, or one.
Any two odd integers will always add up to an even number. Examples include 1+1=2, 15+19=34, etc.
Arrange from smallest to largest
-25, -12/4, 1/5, 18/5, 10
chose the middle number
1/5
Just find the inverse cosine of 1 which is 0 degrees.
