It describes 41.
If it's a prime number between 30 and 60 it has to be: 31, 37, 41, 43, 47, 53, or 59. We can eliminate 37, 47, and 59 because the ones place is larger than the tens.
We now have 31, 41, 43, and 53. 41 is the only one that has the difference of three when you subtract the tens and the ones.
