Answer:
x=5
Explanation:
This is because if you half 4 it equals 2 positive and negative
So does 16 in half is 4 positive and negative
the answers 4 and two are whole numbers not decimals so to find your answer , the question is asking which answer is not a whole number when you half it
25=5
16=4
4=2
0=0
1=1
all positive and negative whole numbers
HOWEVER LETS HALF 5
5=2.23
5 does not become a whole number it is a decimal so that is your answer