This is the tenth in a series of geocaching mystery caches entitled EXERCISES IN GEEKDOM. The number 10 is everywhere; ten fingers, ten toes, ten millimetres in a centimetre, perfect ten, No. 10 Downing Street, neon ten, ten lost tribes, the Ten Commandments, radio ten-codes, 10 lords a leaping, ten pence piece, ten geeky mystery caches...
To get you in the mood for our most well-known number base, you may want to watch this entertaining video on YouTube. It's not a requirement in order to solve this mystery cache but it made me chuckle as it brought back some childhood memories.
So, the puzzle. Examine the following sequence. Simply decide which decimal number comes tenth in the sequence.
- 4891109
- 5045778
- 4891159
- 5109674
- 5131270
- 6922460
- 6922313
- 6925890
- 6926116
- ?
Representing the 7-digit decimal using the 7-letter phrase DECIMAL the cache can found at:
North 51° 27.(DxMxAxL) - I
West 001° 15.((DxC) + M) x (E - I).
Congratulations to WendyKMJ for their FTF on this mystery cache.