If y is a positive integer, for how many values of y is 3/2y greater than 1/4 and less than 1/2?

If y is a positive integer, y >= 1

3/(2y) can be any of the following:

3/2 3/4 3/6 3/8 3/10 3/12 3/14 ...
are candidates. How many of those fit your requirements?