Can you guess the letters in all the question mark locations on this clock? Note the actual shown time is not relevant.
closed as too broad by dcfyj, Rubio♦, Sid, greenturtle3141, Techidiot Apr 10 '17 at 19:14
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This was simply related to the ranking of the world countries by size- first and last letter: 1 to 12
1 Russia R A
2 Canada C A
3 USA U A
4 China C A
5 Brazil B L
6 Australia A A
7 India I A
8 Argentina A A
9 Kazkastan K N
10 Algeria A A
11 Congo C O or D O ( Dem Rep of)
12 Mexico M O
There are some questions about the last 2 ones in some refs.
Here's a solution I found - (This may be slightly off from the OP's intended solution, but does provide the idea he has in mind. I guess)
Take a couple of pairs from the clock starting from 12 o clock. One pair when decoded with the other as a key using Vigenere Cipher, gives the plain text as itself.
KN $\rightarrow$ AA(Key) $\rightarrow$ KN (12-1)
CA $\rightarrow$ AA(Key) $\rightarrow$ CA (2-3)
CA $\rightarrow$ AA(Key) $\rightarrow$ CA (4-5)
AA $\rightarrow$ AA(Key) $\rightarrow$ AA (6-7)
KN $\rightarrow$ AA(Key) $\rightarrow$ KN (8-9)
AA $\rightarrow$ AA(Key) $\rightarrow$ AA (10-11)
And the clock gives