The Secret Code~This is the Coolest thing on earth!!
As you all know, the covers for ‘The Secret Code’ have numbers on them. This left many fans confused and wondered what the numbers meant. Well, if you were one of those fans.. here is the answer to your question!
Jacket A cover
8 + 5 + 2 + 0 - 1 / 7 + 3 = 5
8 + 5 = 13
13 + 2 = 15
15 + 0 = 15
15 - 1 = 14
14 / 7 = 2
2 + 3 = 5
Jacket B cover
6 - 5 + 0 + 8 - 4 = 5
6 - 5 = 1
1 + 0 = 1
1 + 8 = 9
9 - 4 = 5
Source: http://www.tvxqsoul.com/wordpress/
------
As fans, you shld know what special meaning '5' has for the boys!! :P
5+1=0
5-1=0
5=1
this is non-mathematical, but meaningful!! :P