Ann rolls a die twice. What is the probability of getting numbers with a positive difference of 1?

The probability is 5/36.

There are 36 possible outcomes when a die is rolled twice. Out of these, the numbers that have a difference of positive 1 are:

2,1

3,2

4,3

5,4

6,5

There are 5 possibilities out of 36, or 5/36.