posted on Jul, 12 2006 @ 06:51 AM
Symbol between 10 and 19 is same, result = 9
Symbol between 20 and 29 is same, result = 18
Symbol between 30 and 39 is same, result = 27
Symbol between 40 and 49 is same, result = 36
Symbol between 50 and 59 is same, result = 45
Symbol between 60 and 69 is same, result = 54
Symbol between 70 and 79 is same, result = 63
Symbol between 80 and 89 is same, result = 72
Symbol between 90 and 99 is same, result = 81
Or the multiples of 9.
m* (10) + n - m - n = 9 * m with m and n integers between 1 and 9. You will notice that the symbols of the multiples of 9 are each time the same,
although each session a different symbol. That's the "trick".