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Challenge

Original Link

Posted on 26 March 2015


PuzzleEdit

Pillows


Hint 1

Notice the way that some of the upper case letters are followed by a lower case letter in the elements of the first part of the expression.


Hint 2

Use addition to get a total for the symbols that are adjacent rather than just running the numbers together.


Solution

Replacing the letters in the first part of the expression with the atomic weights from a Table of the Elements results in:
Ac - Actinium  - 89
C  - Carbon    -  6
U  - Uranium   - 92
Se - Selenium  - 34
                ---
                221
H  - Hydrogen  -  1
I  - Iodine    - 53
S  - Sulfur    - 16
                ---
                 70
Si - Silocon   - 14
C  - Carbon    -  6
K  - Potassium - 19
Ne - Neon      - 10
S  - Sulfur    - 16
S  - Sulfur    - 16
                ---
                 81
221 + (70 - 81) = 210


Reversing that kind of process and replacing the numbers in the latter part of the expression results in:

84 - Polonium  - Po
53 - Iodine    - I
16 - Sulfur    - S
8  - Oxygen    - O
7  - Nitrogen  - N
53 - Iodine    - I
8  - Oxygen    - O
7  - Nitrogen  - N
16 - Sulfur    - S
PoISON - IONS = Po - Polonium



The answer is stl.la/210polonium. The short links stl.la/210-polonium, stl.la/polonium210 and stl.la/polonium-210 also work (but not stl.la/210po).

RewardEdit

The audio file An Old Story

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