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PONDERING PENTOMINOES (Otago) Mystery Cache

This cache has been archived.

katie w: Sadly and reluctantly archiving this cache. The "renovations" at GZ have removed all the cover and GZ is open to view.
There is no place to hide.
Not able to reposition nearby at this stage.

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Hidden : 8/8/2013
Difficulty:
2.5 out of 5
Terrain:
1.5 out of 5

Size: Size:   small (small)

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Geocache Description:

There is no cache at the published coordinates, do not go there.Solve the puzzle and you are looking for a 200ml camoed container hidden at ground level.


A pentomino is a plane geometric shape composed of five identical squares connected along their edges.

There are 12 different pentominoes, named after the letters of the alphabet that they resemble.

You can see these 12 basic shapes in the diagram below.

Some of the shapes have a mirror image , and adding their reflections brings  the number of one sided pentominoes to 18.

You will see a sample of what a completed 6x10 grid can look like in the background image of this page.

To find the coordinates of this cache, you will need to solve a dissection puzzle of the 8x5 rectanglar puzzle grid shown below. There are  8 pentaminoes, each one containing 2 numbers, a letter, an arithmetic operation  sign and an equals sign. No shape is used more than once, but the shapes have been taken from the list of 18.

For each pentomino in your dissection, unscramble the symbols in it to form an equation which has a single digit answer.

The answers A to H fill in the missing digits of the coordinate solution.

The cache is at  S 45 5A.BCD  E 170 EF.GHE  

You can check your answers for the puzzle on .

Please use the checker to verify your answer, and receive additional information.

Additional Hints (Decrypt)

CHMMYR: K H V J C S I A

Decryption Key

A|B|C|D|E|F|G|H|I|J|K|L|M
-------------------------
N|O|P|Q|R|S|T|U|V|W|X|Y|Z

(letter above equals below, and vice versa)