Adrian asked some friends to each make up a list of four perfect squares greater than zero, each having no more than four digits, that together use all ten digits exactly once.
Alice's and Brian's lists contained exactly two squares in common. Carol's list had no square in common with either Alice's or Brian's. David found a different set.
What was Carol's list and what was David's list?
Carol's list of four positive perfect squares was: (1, 36, 784, 9025), while the corresponding list for David was: (9, 16, 784, 3025).