The Master puzzle is more complicated, naturally. Charlotte's journal says, "The top and bottom edges are equal to the day of his death, the day of dedication equal to either side."
Hint 2
So the top and bottom numbers need to add up to 25, and the sides need to add up to 15.
Hint 3
If you're a number whiz, I bet you're having fun with this. If you're not and you're not, here's the answer: