In each of the puzzles for the Inside Track the number of the puzzle is
spelled downward across the other words. You can locate where to put the
number by inserting letters in the squares. When the square turns a
different colour you know that is where you should be able to spell the
corresponding number.
Hint:
Last elevator puzzle:- Press the key on the far right elevator of the
last set. All the other elevators will align for the three to cross
immediately from the left to the right.