9, 9, 18, 9, 17, 8, 15, 6, 11, 2, 3, 5, 8, 13, 4, 7... There is a pattern that shows the next number(s). Find what it is and say what the next three are.

(In reply to Confused by Richard)

Richard, there are a number of ways to state the rules.
I think this is the best (although I didn't use it :-(   ) :
The next number is the sum of the two digits before it, so:
0 + 9 = 9
9 + 9 = 18
1 + 8 = 9
8 + 9 = 17
1 + 7 = 8
7 + 8 = 15
And so on...

Posted by Hugo on 2005-04-15 21:42:18