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Hungry Hungry Hippo Multi-Cache

This cache has been archived.

da Bush Man: Well, there you have it. No spot no matter how inaccessible can't be muggled by a well-intentioned maintenance worker that shows up once a generation! Unfortunately this one-of-a-kind container cannot be replaced, so it is with a heavy heart I retire this cache to faded memory. Thank you to all that visited and a special acknowledgement to the very few who solved this challenging puzzle. Ciao!

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Hidden : 4/3/2017
Difficulty:
4.5 out of 5
Terrain:
3.5 out of 5

Size: Size:   small (small)

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Geocache Description:

Its been said that the "cheque" is in the mail, but what if the account number is fake? Welcome to the MOD11 Check Digit Multi. You'll need to come prepared with paper and pencil and know how to calculate the check digit in order to determine the redirect coordinates.


At the posted coordinates you will find a collection of mailboxes you will need to observe in order to form the account number. Calculate the missing MOD11 check digit at the end of the account number. As part of that calculation, you will have determined an interim large sum (A) before calculating the modulus (B), and the check digit (C).

Add A*C to northing and subtract A*B from westing of these fake coordinates: N43 09.812 W80 15.780

Additional Hints (Decrypt)

hc

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)