According to the meaning of the question, because it is a true score, it can only be counted from 2. Because the denominator of 2 is odd, and the denominator equal to 2 is the sum of even numbers, find the least common multiple of these four numbers, which should include this least common multiple. So it can be determined that three of these four numbers are 2, 3 and 5, and their least common multiple is 30, so these four numbers are 2, 3, 5 and 30.

And1/3+1/5 = 8/15 =16/30,1/2+1/30 =16/.

So the four true scores are 1/2, 1/3, 1/5, 1/30.