Under the Instructor Tools menu, go to “Hmwk Sets Editor”

Click on the number (will look like 100/100 etc.) under the column “Edit Assigned Users” for that homework

Click on the link “Edit data for studentA” where studentA is the user ID for the student whose problem you would like to change.

On the “Set Detail” page you now see the the details of studentA's assignment. You can change the seed for any one of the problems by entering a new number for the seed and clicking the “Save Changes” button. You can use any number for the seed. This will change the appearance of the problem for studentA, but nothing else.