To find this cache I need a volunteer from the audience. Anyone? You there! Reading this! Come on up here and help me with this "magic" trick!
Here is your coords:
N 38° 18.683
W 087° 37.54_
As you can see you have a number missing, but some simple math should do the trick!
Think of a number between 1-1000. Got it? Ok! Now double it. Hmmm.... Add..... 16! Ok? Alright here is the tough part.... Lets divide by 2. Now, finally subtract the number you began with. Got it? What you are left with is the final number for the coordinates! Ta da! "Magic"!