
Not sure what you're talking about. 9+3=12 ... not 13.
Since everyone says these numbers used by KGC and others in their clues are related to scripture, we would probably do well to see how those numbers are actually used in scripture.
The number 3 is used in scripture to denote emphasis or importance, and the number 7 is used in scripture to represent perfection.
That is why the number 666 is used to mark the wild beast. 6 is one short of perfection, representing man removed from God. The number repeated 3 times to emphasize the gap. Remember, it says of the number 666, "This is where it calls for wisdom: Let the one who has insight calculate the number of the wild beast, for
it is a man’s number, and its number is 666." (Revelation 13:18)
While the ones who left clues may have had other things in mind, that is the way scripture uses those numbers. Why is that brought up?
To say that 3 represents perfection (but it does make the strongest geometric shape) is incorrect from the scriptural viewpoint.
A cube has 6 sides and 8 points, thus a die is numbered 1 to six with the total of any two opposing sides equal to 7.
A pyramid has 5 sides and 7 points.