There are a total of 64 hexagrams which make-up the I Ching.
Each hexagram is composed of 6 horizontal lines, which can be “broken” or “unbroken”. (Unbroken lines are solid, while broken lines have a gap at their center.)
With a total of 6 lines in each hexagram, and 2 binary possibilities for each line, there are a total of 2x2x2x2x2x2 (or 26) hexagrams , or 64 hexagrams in total.
While 64 hexagrams may seem like a relatively small number of hexagrams, it is important to note that I Ching Readings incorporate the idea of changing lines. The presence of a changing line indicates a state of transformation from one hexagram to a different hexagram.
Because each of the 64 hexagrams has the potential to transition to any of the 63 remaining hexagrams, there are in fact a total of 4032 possible I Ching transformation pairs. (Because 64 x 63 = 4032).
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