This is a little trick I learned while listening to Art Bell


Turn any number into a 9:



Lets take say any random number....

how about

158:



ok

so 1+5+8 = 14

158-14 = 144

1+4+4 = 9



lets try a little bit of a larger number....



984:



9+8+4 = 21

984-21 = 963

9+6+3 = 18

1+8 = 9



Two digit number?



61:



6+1 = 7

61-7 = 54

5+4 = 9



Four Digits?



4568:



4+5+6+8 = 23

4568-23 = 4545

4+5+4+5 = 18

1+8 = 9



As far as I can tell this works with any number.