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Happy Birthday! Mystery Cache

This cache has been archived.

CacheShadow: The cache owner should contact me via my profile page if they wish to discuss if this cache page can be Unarchived.
(All outstanding issues would need to be addressed in compliance with the current Geocaching Guidelines).
CacheShadow - Community Volunteer Reviewer

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Hidden : 7/6/2015
Difficulty:
3 out of 5
Terrain:
1.5 out of 5

Size: Size:   small (small)

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Geocache Description:

Cache is NOT located at posted coordinates, but is within 2km.

Barb and Laura just became friends with Bill, and they want to know when his birthday is. Bill gives them a list of 10 possible dates:

  • May 15
  • May 16
  • May 19
  • June 17
  • June 18
  • July 14
  • July 16
  • August 14
  • August 15
  • August 17

Bill then tells Barb and Laura separately the month and the day of his birthday respectively.

Barb: I don't know when Bill's birthday is, but I know that Laura doesn't know it either.

Laura: At first I didn't know when Bill's birthday is, but I know now.

Barb: Then I also know when Bill's birthday is.

So when is Bill's birthday?

Assuming MDD = ABC, and converting any negative values to positive, where is Bill's birthday cache hidden?

N (B+4)(C-3).(A*B-C)(A-1-C)(A-4)

W (B+4)(A-A).(C-1)(C-A)(A+1)

You can check your answers for this puzzle on GeoChecker.com.

Container has room for log & pencil and some small swag. Please ensure that cache is replaced exactly as found, and well covered.

Congratulations to canmoose for being FTF!

All characters appearing in this cache are fictitious. Any resemblance to real persons is purely coincidental.

Additional Hints (No hints available.)