A man made object is your center of attention. You have to go there.
A is the number of wheels not on the ground
B is the number of rivits holding the rear towing ring divided by two
C is the number of grooves in the rifling minus one
D is the last digit in the year of production
EF is the number of pieces of wood plus one
GH is the number of angle positions on the arc including the one occupied.
Now the tricky bit. A, B, C, D, EF, GH, JK, LM, NP... is a mathematical series.
Your task, is to work out JK, LM, and NP, the next three numbers in the series.
The cache is at 37 51.(N+P) P (K-N) 144 54.L (N+J) (M-L)