In a certain country ½ of 5 = 3. If the same proportion holds, what is the value of 1/3 of 10 ?

Simple Maths Puzzle

4
5/2 = 3 and 10/3 = x
(10/3)/(5/2) = 20/15 = 4/3
So x/3 = 4/3
x=4