Trick or Treat Page Two

Matilda Mathison

Many residents think apartment Six-Hundred and Twenty Four is empty, however, the one who lives in that room has been here the longest.
Long enough to be forgotten about. Mr. Mathison's adopted daughter, Matilda.
She's alive, we promise. But she's never been seen.

That doesn't mean she can't see you.

Treat 1 of 3

Here's the next hint :
How many apartments are in Mathison House?